Vulnerability database
Every flaw the U.S. government’s cybersecurity agency (CISA) has confirmed attackers are using, plus the new WordPress plugin and theme bugs published each day, sorted by what they mean for a small business. We refresh it twice a day. If you see something your website or office runs, tell us.
1,693 results · page 7 of 34
May 27, 2026In the Linux kernel, the following vulnerability has been resolved: usb: cdns3: fix role switching during resume If the role change while we are suspended, thCVE-2026-45911 · Computers, phones & browsers · Linux · reported by 416baaa9-dc9f-4396-8d5f-8c081fb06d67Medium 5.5
In the Linux kernel, the following vulnerability has been resolved: usb: cdns3: fix role switching during resume If the role change while we are suspended, the cdns3 driver switches to the new mode during resume. However, switching to host mode in this context causes a NULL pointer dereference. The host role's start() operation registers a xhci-hcd device, but its probe is deferred while we are in the resume path. The host role's resume() operation assumes the xhci-hcd device is already probed, which is not the case, leading to the dereference. Since the start() operation of the new role is already called, the resume operation can be skipped. So skip the resume operation for the new role if a role switch occurs during resume. Once the resume sequence is complete, the xhci-hcd device can be probed in case of host mode. Unable to handle kernel NULL pointer dereference at virtual address 0000000000000208 Mem abort info: ... Data abort info: ... [0000000000000208] pgd=0000000000000000, p4d=0000000000000000 Internal error: Oops: 0000000096000004 [#1] SMP Modules linked in: CPU: 0 UID: 0 PID: 146 Comm: sh Not tainted 6.19.0-rc7-00013-g6e64f4aabfae-dirty #135 PREEMPT Hardware name:
- Product
- Linux
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordgit.kernel.orggit.kernel.org
May 26, 2026luci-app-https-dns-proxy through 2025.12.29-5 — an optional LuCI web UI add-on for the https-dns-proxy package, distributed through the OpenWrt community packagCVE-2026-46368 · Other software · mossdef-org · reported by VulnCheckHigh 8.7
luci-app-https-dns-proxy through 2025.12.29-5 — an optional LuCI web UI add-on for the https-dns-proxy package, distributed through the OpenWrt community packages feed and not installed by default — contains a command injection vulnerability in the setInitAction function. An authenticated user holding the luci.https-dns-proxy ACL permission can inject shell metacharacters through the 'name' parameter of a ubus RPC call to luci.https-dns-proxy setInitAction, resulting in arbitrary command execution as root on the underlying device. Core OpenWrt is not affected; only installations that have opted in to the luci-app-https-dns-proxy package are vulnerable.
- Product
- luci-app-https-dns-proxy
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordgithub.comexploit-db.com
May 25, 2026Firefox for iOS displayed specially crafted right-to-left (RTL) and internationalized domain names (IDNs) incorrectly in link preview UI surfaces.CVE-2026-9078 · Computers, phones & browsers · Mozilla · reported by security@mozilla.orgMedium 5.4
Firefox for iOS displayed specially crafted right-to-left (RTL) and internationalized domain names (IDNs) incorrectly in link preview UI surfaces. A crafted RTL hostname could visually reorder portions of the displayed domain, causing attacker-controlled sites to appear as trusted origins. This vulnerability was fixed in Firefox for iOS 151.1.
- Product
- Firefox for iOS
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordbugzilla.mozilla.orgmozilla.org
May 21, 2026Insufficient Validation of Member Zone Data May Cause Catalog Zone Transfer to FailCVE-2026-42396 · Other software · PowerDNS · reported by security@open-xchange.comMedium 4.9
Insufficient Validation of Member Zone Data May Cause Catalog Zone Transfer to Fail
- Product
- Authoritative
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
May 21, 2026Concurrency and locking defects in GSS-TSIGCVE-2026-42002 · Other software · PowerDNS · reported by security@open-xchange.comMedium 5.9
Concurrency and locking defects in GSS-TSIG
- Product
- Authoritative
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
May 21, 2026Insufficient Validation of Autoprimary SOA QueriesCVE-2026-42001 · Other software · PowerDNS · reported by security@open-xchange.comHigh 7.5
Insufficient Validation of Autoprimary SOA Queries
- Product
- Authoritative
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
May 21, 2026Insufficient Validation of Names During AXFRCVE-2026-42000 · Other software · PowerDNS · reported by security@open-xchange.comMedium 6.8
Insufficient Validation of Names During AXFR
- Product
- Authoritative
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
May 21, 2026Incorrect Behaviour of Views with TCP PROXY RequestsCVE-2026-41999 · Other software · PowerDNS · reported by security@open-xchange.comMedium 4.8
Incorrect Behaviour of Views with TCP PROXY Requests
- Product
- Authoritative
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
May 20, 2026Multiple flaws have been identified in `named` related to the handling of DNS messages whose CLASS is not Internet (`IN`) — for example, `CHAOS` or `HESIOD`, orCVE-2026-5946 · Other software · ISC · reported by security-officer@isc.orgHigh 7.5
Multiple flaws have been identified in `named` related to the handling of DNS messages whose CLASS is not Internet (`IN`) — for example, `CHAOS` or `HESIOD`, or DNS messages that specify meta-classes (`ANY` or `NONE`) in the question section. Specially crafted requests reaching the affected code paths — recursion, dynamic updates (`UPDATE`), zone change notifications (`NOTIFY`), or processing of `IN`-specific record types in non-`IN` data — can cause assertion failures in `named`. This issue affects BIND 9 versions 9.11.0 through 9.16.50, 9.18.0 through 9.18.48, 9.20.0 through 9.20.22, 9.21.0 through 9.21.21, 9.11.3-S1 through 9.16.50-S1, 9.18.11-S1 through 9.18.48-S1, and 9.20.9-S1 through 9.20.22-S1.
- Product
- BIND 9
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recorddownloads.isc.orgdownloads.isc.org
May 20, 2026A use-after-free vulnerability exists within the DNS-over-HTTPS implementation.CVE-2026-3593 · Other software · ISC · reported by security-officer@isc.orgHigh 7.4
A use-after-free vulnerability exists within the DNS-over-HTTPS implementation. This issue affects BIND 9 versions 9.20.0 through 9.20.22, 9.21.0 through 9.21.21, and 9.20.9-S1 through 9.20.22-S1. BIND 9 versions 9.18.0 through 9.18.48 and 9.18.11-S1 through 9.18.48-S1 are NOT affected.
- Product
- BIND 9
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recorddownloads.isc.orgdownloads.isc.org
May 20, 2026NLnet Labs Unbound up to and including version 1.25.0 has a denial of service vulnerability in the DNSSEC validator that can lead to a crash given malicious upsCVE-2026-42959 · Other software · NLnet Labs · reported by sep@nlnetlabs.nlHigh 8.7
NLnet Labs Unbound up to and including version 1.25.0 has a denial of service vulnerability in the DNSSEC validator that can lead to a crash given malicious upstream replies. When Unbound constructs chase-reply messages for validation, the code uses the wrong counter to calculate write offsets for ADDITIONAL section rrsets. DNAME duplication could increase the ANSWER section count and authority filtering could decrease the AUTHORITY section count and create an uninitialized array slot. Combining these two, the validator later dereferences this uninitialized pointer, causing an immediate process crash. An adversary controlling a DNSSEC-signed domain can trigger this bug with a single query by configuring a DNAME chain with unsigned CNAMEs and a response containing unsigned AUTHORITY records alongside signed ADDITIONAL glue records. Unbound 1.25.1 contains a patch with a fix to use the proper counters to calculate the write offsets.
- Product
- Unbound
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordnlnetlabs.nlaccess.redhat.com
May 20, 2026NLnet Labs Unbound 1.14.0 up to and including version 1.25.0 has a vulnerability that results in heap overflow when encoding multiple NSID and/or DNS Cookie EDNCVE-2026-42944 · Other software · NLnet Labs · reported by sep@nlnetlabs.nlHigh 8.7
NLnet Labs Unbound 1.14.0 up to and including version 1.25.0 has a vulnerability that results in heap overflow when encoding multiple NSID and/or DNS Cookie EDNS and/or EDNS Padding options in the reply packet. The relevant options ('nsid', 'answer-cookie', 'pad-responses' (default)) need to be enabled for the vulnerability to be exploited. An adversary who can query Unbound can exploit the vulnerability by attaching multiple NSID and/or DNS Cookie EDNS and/or EDNS Padding options to the query. A flaw in the size calculation of the EDNS field truncates the correct value which allows the encoder to overflow the available space when writing. Those two combined lead to a heap overflow write of Unbound controlled data and eventually a crash. Unbound 1.25.1 contains a patch with a fix to de-duplicate the EDNS options and a fix to prevent truncation of the EDNS field size calculation.
- Product
- Unbound
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordnlnetlabs.nlaccess.redhat.com
May 20, 2026NLnet Labs Unbound up to and including version 1.25.0 has a vulnerability in the DNSSEC validator where the code path to consult the negative cache for DS recorCVE-2026-42923 · Other software · NLnet Labs · reported by sep@nlnetlabs.nlMedium 6.9
NLnet Labs Unbound up to and including version 1.25.0 has a vulnerability in the DNSSEC validator where the code path to consult the negative cache for DS records does not take into account the limit on NSEC3 hash calculations introduced in 1.19.1. This leads to degradation of service during the attack. An adversary that controls a DNSSEC signed zone can exploit this by signing NSEC3 records with acceptably high iterations for child delegations and querying a vulnerable Unbound. Unbound will keep performing the allowed hash calculations on the NSEC3 records and will not limit the work by the mitigation introduced in 1.19.1. As a side effect, a global lock for the negative cache will be held for the duration of the hashing, blocking other threads that need to consult the negative cache. Coordinated attacks could raise the vulnerability to denial of service. Unbound 1.25.1 contains a patch with a fix to bound the vulnerable code path with the existing limit for NSEC3 hash calculations.
- Product
- Unbound
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
May 20, 2026NLnet Labs Unbound up to and including version 1.25.0 is vulnerable to a degradation of service attack related to parsing long lists of incoming EDNS options.CVE-2026-41292 · Other software · NLnet Labs · reported by sep@nlnetlabs.nlMedium 6.6
NLnet Labs Unbound up to and including version 1.25.0 is vulnerable to a degradation of service attack related to parsing long lists of incoming EDNS options. An adversary sending queries with too many EDNS options can hold Unbound threads hostage while they are parsing and creating internal data structures for the options. Coordinated attacks can result in degradation and/or denial of service. Unbound 1.25.1 contains a patch with a fix to limit acceptable incoming EDNS options (100).
- Product
- Unbound
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordnlnetlabs.nlaccess.redhat.com
May 20, 2026NLnet Labs Unbound 1.19.1 up to and including version 1.25.0 has a vulnerability in the DNSSEC validator that enables denial of service and possible remote codeCVE-2026-33278 · Other software · NLnet Labs · reported by sep@nlnetlabs.nlCritical 9.1
NLnet Labs Unbound 1.19.1 up to and including version 1.25.0 has a vulnerability in the DNSSEC validator that enables denial of service and possible remote code execution as a result of deep copying a data structure and erroneously overwriting a destination pointer. An adversary can exploit the vulnerability by controlling a malicious signed zone and querying a vulnerable Unbound. When DS sub-queries need to suspend validation due to NSEC3 computational budget exhaustion (introduced in Unbound 1.19.1), Unbound deep-copies response messages to preserve them across memory region teardown. A struct-assignment bug overwrites the destination's pointer with the source's pointer. After the sub-query region is freed, the resumed validator dereferences this dangling pointer, triggering a crash or potentially enabling arbitrary code execution. Unbound 1.25.1 contains a patch with a fix to preserve the correct pointer when deep copying the data structure.
- Product
- Unbound
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordnlnetlabs.nlaccess.redhat.com
May 20, 2026NLnet Labs Unbound 1.6.2 up to and including version 1.25.0 has a denial of service vulnerability when compiled with DNSCrypt support ('--enable-dnscrypt').CVE-2026-32792 · Other software · NLnet Labs · reported by sep@nlnetlabs.nlMedium 4.6
NLnet Labs Unbound 1.6.2 up to and including version 1.25.0 has a denial of service vulnerability when compiled with DNSCrypt support ('--enable-dnscrypt'). A bad DNSCrypt query could underflow Unbound's DNSCrypt packet reading procedure that may lead to heap overflow. A malicious actor can exploit the vulnerability with a single bad DNSCrypt query that its decrypted plaintext consists entirely of '0x00' bytes and does not contain the expected '0x80' marker. Unbound would then start reading more bytes than necessary until it finds a non-'0x00' byte. Based on the underlying memory allocator and the memory layout, it could lead to heap overflow while reading followed by a crash. Likelihood of a crash is low, since it relies heavily on the underlying memory allocator and the memory layout. If the heap overflow does not happen, Unbound's later packet checks will deny the packet. Unbound 1.25.1 contains a patch with a fix to bound reading in the given buffer space.
- Product
- Unbound
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
May 19, 2026Technitium DNS Server aggressively tries to fetch missing RRSIG records or mismatched DNSKEY records.CVE-2026-45557 · Other software · Technitium · reported by 9119a7d8-5eab-497f-8521-727c672e3725Medium 6.9
Technitium DNS Server aggressively tries to fetch missing RRSIG records or mismatched DNSKEY records. An attacker in control of a domain can cause a vulnerable system to generate excessive network traffic. Fixed in 15.0.
- Product
- DNS Server
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordgithub.comraw.githubusercontent.com
May 13, 2026SSL verification is disabled in the DNS Cluster system.CVE-2026-32992 · Other software · WebPros · reported by support@hackerone.comHigh 8.2
SSL verification is disabled in the DNS Cluster system. This could allow for a malicious server to man-in-the-middle the request and capture credentials.
- Product
- cPanel
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
May 13, 2026A buffer overflow vulnerability in the DNS proxy and DNS Server features of Palo Alto Networks PAN-OS® Software allows an unauthenticated attacker with network CVE-2026-0264 · Network & remote access · Palo Alto Networks · reported by psirt@paloaltonetworks.comHigh 7.2
A buffer overflow vulnerability in the DNS proxy and DNS Server features of Palo Alto Networks PAN-OS® Software allows an unauthenticated attacker with network access to cause a denial of service (DoS) condition (all PAN-OS platforms except Cloud NGFW and Prisma Access) or potentially execute arbitrary code by sending specially crafted network traffic (PA-Series hardware only). Panorama, Cloud NGFW, and Prisma® Access are not impacted by this vulnerability.
- Product
- Cloud NGFW
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordsecurity.paloaltonetworks.comcert-portal.siemens.com
May 13, 2026When BIG-IP DNS is provisioned, a vulnerability exists in an undisclosed TMOS Shell (tmsh) command that may allow a highly privileged authenticated attacker to CVE-2026-42408 · Network & remote access · F5 · reported by f5sirt@f5.comMedium 6.7
When BIG-IP DNS is provisioned, a vulnerability exists in an undisclosed TMOS Shell (tmsh) command that may allow a highly privileged authenticated attacker to view sensitive information. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
- Product
- BIG-IP
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
May 13, 2026When BIG-IP DNS is provisioned, a vulnerability exists in an undisclosed iControl REST and BIG-IP TMOS Shell (tmsh) command that may allow an authenticated attaCVE-2026-40061 · Network & remote access · F5 · reported by f5sirt@f5.comHigh 8.5
When BIG-IP DNS is provisioned, a vulnerability exists in an undisclosed iControl REST and BIG-IP TMOS Shell (tmsh) command that may allow an authenticated attacker with the Resource Administrator or Administrator role to execute arbitrary system commands with higher privileges. In Appliance mode deployments, a successful exploit can allow the attacker to cross a security boundary. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
- Product
- BIG-IP
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
May 13, 2026When a BIG-IP is configured with DNS caching (Such as a DNS profile with caching enabled, SSL Orchestrator, Advanced WAF DoS protection), undisclosed traffic cCVE-2026-39458 · Network & remote access · F5 · reported by f5sirt@f5.comHigh 8.7
When a BIG-IP is configured with DNS caching (Such as a DNS profile with caching enabled, SSL Orchestrator, Advanced WAF DoS protection), undisclosed traffic can cause the Traffic Management Microkernel (TMM) to terminate. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
- Product
- BIG-IP
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
May 13, 2026When BIG-IP DNS is provisioned, a vulnerability exists in the gtm_add and bigip_add iControl REST commands that return the ssh-password parameter in cleartext iCVE-2026-28758 · Network & remote access · F5 · reported by f5sirt@f5.comMedium 6.7
When BIG-IP DNS is provisioned, a vulnerability exists in the gtm_add and bigip_add iControl REST commands that return the ssh-password parameter in cleartext in the iControl REST response and is also logged in the audit log. This may allow a highly privileged, authenticated attacker with access to the audit log to view sensitive information. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated
- Product
- BIG-IP
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
May 12, 2026Heap-based buffer overflow in Microsoft Windows DNS allows an unauthorized attacker to execute code over a network.CVE-2026-41096 · Computers, phones & browsers · Microsoft · reported by secure@microsoft.comCritical 9.8
Heap-based buffer overflow in Microsoft Windows DNS allows an unauthorized attacker to execute code over a network.
- Product
- Windows 11 version 23H2
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
May 11, 2026Pi-hole is a DNS sinkhole that protects devices from unwanted content without installing any client-side software.CVE-2026-41489 · Other software · pi-hole · reported by GitHubHigh 8.8
Pi-hole is a DNS sinkhole that protects devices from unwanted content without installing any client-side software. From 6.0 to before Core 6.4.2 and FTL 6.6.1, two shell scripts executed as root by systemd (pihole-FTL-prestart.sh and pihole-FTL-poststop.sh) read the files.pid path from this config without validation and use it in privileged file operations (install and rm -f). By writing an arbitrary path into files.pid, an attacker with pihole privilege can cause root to delete and then recreate any file on the system outside the ProtectSystem=full-restricted directories, gaining write access to it. On a default Pi-hole installation this yields local privilege escalation to root via SSH authorized keys manipulation. If /root/.ssh/authorized_keys does not exist (default on fresh installs), only ExecStartPre is required. If the file exists, ExecStopPost deletes it first, and the same restart triggers both hooks in sequence. This vulnerability is fixed in Core 6.4.2 and FTL 6.6.1.
- Product
- pi-hole
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
May 11, 2026A buffer overflow in dnsmasq’s extract_addresses() function allows an attacker to trigger a heap out-of-bounds read and crash by exploiting a malformed DNS respCVE-2026-5172 · Other software · dnsmasq · reported by cret@cert.orgHigh 7.3
A buffer overflow in dnsmasq’s extract_addresses() function allows an attacker to trigger a heap out-of-bounds read and crash by exploiting a malformed DNS response, enabling extract_name() to advance the pointer past the record’s end.
- Product
- dnsmasq
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
May 11, 2026An information disclosure vulnerability in dnsmasq allows remote attackers to bypass source checks via a crafted DNS packet with RFC 7871 client subnet informatCVE-2026-4893 · Other software · dnsmasq · reported by cret@cert.orgMedium 5.3
An information disclosure vulnerability in dnsmasq allows remote attackers to bypass source checks via a crafted DNS packet with RFC 7871 client subnet information.
- Product
- dnsmasq
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
May 11, 2026A heap-based out-of-bounds write vulnerability in the DHCPv6 implementation of dnsmasq allows local attackers to execute arbitrary code with root privileges viaCVE-2026-4892 · Other software · dnsmasq · reported by cret@cert.orgHigh 8.4
A heap-based out-of-bounds write vulnerability in the DHCPv6 implementation of dnsmasq allows local attackers to execute arbitrary code with root privileges via a crafted DHCPv6 packet.
- Product
- dnsmasq
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
May 11, 2026A heap-based out-of-bounds read vulnerability in the DNSSEC validation of dnsmasq allows remote attackers to cause a denial of service via a crafted DNS packet.CVE-2026-4891 · Other software · dnsmasq · reported by cret@cert.orgMedium 5.3
A heap-based out-of-bounds read vulnerability in the DNSSEC validation of dnsmasq allows remote attackers to cause a denial of service via a crafted DNS packet.
- Product
- dnsmasq
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
May 11, 2026A Denial of Service (DoS) vulnerability in the DNSSEC validation of dnsmasq allows remote attackers to cause a denial of service via a crafted DNS packet.CVE-2026-4890 · Other software · dnsmasq · reported by cret@cert.orgHigh 7.5
A Denial of Service (DoS) vulnerability in the DNSSEC validation of dnsmasq allows remote attackers to cause a denial of service via a crafted DNS packet.
- Product
- dnsmasq
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
May 11, 2026dnsmasqs extract_name() function can be abused to cause a heap buffer overflow, allowing an attacker to inject false DNS cache entries, which could result in DNCVE-2026-2291 · Other software · dnsmasq · reported by cret@cert.orgHigh 7.3
dnsmasqs extract_name() function can be abused to cause a heap buffer overflow, allowing an attacker to inject false DNS cache entries, which could result in DNS lookups to redirect to an attacker-controlled IP address, or to cause a DoS.
- Product
- dnsmasq
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
May 11, 2026A weakness has been identified in D-Link DNS-320 2.06B01.CVE-2026-8273 · Network & remote access · D-Link · reported by VulDBMedium 5.1
A weakness has been identified in D-Link DNS-320 2.06B01. This impacts the function cgi_set_host/cgi_set_ntp/cgi_fan_control/cgi_merge_user of the file /cgi-bin/system_mgr.cgi. This manipulation causes os command injection. It is possible to initiate the attack remotely.
- Product
- DNS-320
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
May 11, 2026A security flaw has been discovered in D-Link DNS-320 2.06B01.CVE-2026-8272 · Network & remote access · D-Link · reported by VulDBLow 2
A security flaw has been discovered in D-Link DNS-320 2.06B01. This affects the function delete/rename/copy/move/chmod/chown of the file /cgi-bin/webfile_mgr.cgi. The manipulation results in os command injection. The attack may be performed from remote. The exploit has been released to the public and may be used for attacks.
- Product
- DNS-320
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
May 11, 2026A vulnerability was identified in D-Link DNS-320 2.06B01.CVE-2026-8271 · Network & remote access · D-Link · reported by VulDBLow 2
A vulnerability was identified in D-Link DNS-320 2.06B01. The impacted element is the function cgi_speed/cgi_dhcpd_lease/cgi_ddns/cgi_set_ip/cgi_upnp_del/cgi_dhcpd/cgi_upnp_add/cgi_upnp_edit of the file /cgi-bin/network_mgr.cgi. The manipulation leads to os command injection. The attack is possible to be carried out remotely. The exploit is publicly available and might be used.
- Product
- DNS-320
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
May 7, 2026When using LookupCNAME with the cgo DNS resolver, a very long CNAME response can trigger a double-free of C memory and a crash.CVE-2026-33811 · Other software · Go standard library · reported by security@golang.orgHigh 7.5
When using LookupCNAME with the cgo DNS resolver, a very long CNAME response can trigger a double-free of C memory and a crash.
- Product
- net
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
May 5, 2026CoreDNS is a DNS server written in Go.CVE-2026-35579 · Other software · coredns · reported by GitHubHigh 8.2
CoreDNS is a DNS server written in Go. In versions prior to 1.14.3, the gRPC, QUIC, DoH, and DoH3 transport implementations incorrectly handle TSIG authentication. For gRPC and QUIC, the server checks whether the TSIG key name exists in the configuration but never calls dns.TsigVerify() to validate the HMAC. If the key name matches a configured key, the tsigStatus field remains nil and the tsig plugin treats the request as successfully authenticated regardless of the MAC value. For DoH and DoH3, the issue is more severe: the DoHWriter.TsigStatus() method unconditionally returns nil, and the server never inspects the TSIG record at all. Any request containing a TSIG record is treated as authenticated over DoH and DoH3, even if the key name is invalid and the MAC is arbitrary. An unauthenticated network attacker can exploit this to bypass TSIG-protected functionality such as AXFR/IXFR zone transfers, dynamic DNS updates, or other TSIG-gated plugin behavior. The DoH and DoH3 variants have a lower exploitation bar because the attacker does not need to know a valid TSIG key name. This issue has been fixed in version 1.14.3. As a workaround, disable gRPC, QUIC, DoH, and DoH3 listeners
- Product
- coredns
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordgithub.comaccess.redhat.com
May 5, 2026CoreDNS is a DNS server that chains plugins.CVE-2026-33489 · Other software · coredns · reported by GitHubHigh 8.2
CoreDNS is a DNS server that chains plugins. In versions prior to 1.14.3, the transfer plugin can select the wrong ACL stanza when both a parent zone and a more-specific subzone are configured. The longestMatch() function in plugin/transfer/transfer.go uses a lexicographic string comparison instead of an actual longest-suffix match to select the winning zone. As a result, a permissive parent-zone transfer rule can override a restrictive subzone rule depending on zone name ordering (e.g., "example.org." > "a.example.org." lexicographically). This allows an unauthorized remote client to perform AXFR/IXFR for the subzone and retrieve its full zone contents. This issue has been fixed in version 1.14.3.
- Product
- coredns
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
May 5, 2026CoreDNS is a DNS server that chains plugins.CVE-2026-33190 · Other software · coredns · reported by GitHubHigh 8.7
CoreDNS is a DNS server that chains plugins. In versions prior to 1.14.3, the tsig plugin can be bypassed on non-plain-DNS transports (DoT, DoH, DoH3, DoQ, and gRPC) because it trusts the transport writer's TsigStatus() instead of performing verification itself. The DoH and DoH3 writer's TsigStatus() always returns nil, the DoT server does not set TsigSecret on the dns.Server, and the DoQ and gRPC writers also unconditionally return nil. This allows an unauthenticated remote client to bypass TSIG-based authentication and access resources intended to be restricted behind a tsig require all policy. Plain DNS over TCP and UDP are not affected. This issue has been fixed in version 1.14.3.
- Product
- coredns
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
May 5, 2026CoreDNS is a DNS server that chains plugins.CVE-2026-32936 · Other software · coredns · reported by GitHubHigh 8.7
CoreDNS is a DNS server that chains plugins. In versions prior to 1.14.3, the DNS-over-HTTPS (DoH) GET path accepts oversized dns= query parameter values and performs URL query parsing, base64 decoding, and DNS message unpacking before rejecting the request. Unlike the POST path, which applies a bounded read via http.MaxBytesReader limited to 65536 bytes, the GET path has no equivalent size validation before expensive processing. A remote, unauthenticated attacker can repeatedly send oversized DoH GET requests to force high CPU usage, large transient memory allocations, and elevated garbage-collection pressure, leading to denial of service. This issue has been fixed in version 1.14.3.
- Product
- coredns
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
May 5, 2026CoreDNS is a DNS server that chains plugins.CVE-2026-32934 · Other software · coredns · reported by GitHubHigh 8.7
CoreDNS is a DNS server that chains plugins. In versions prior to 1.14.3, the DNS-over-QUIC (DoQ) server can be driven into unbounded goroutine and memory growth by a remote client that opens many QUIC streams and sends only 1 byte per stream. When the worker pool is full, CoreDNS still spawns a goroutine per accepted stream to wait for a worker token. Additionally, active workers block indefinitely in io.ReadFull() with no per-stream read deadline, allowing an attacker to pin all workers by sending a single byte so the read blocks waiting for the second byte of the DoQ length prefix. This enables an unauthenticated remote attacker to cause memory exhaustion and OOM-kill. This issue has been fixed in version 1.14.3. No known workarounds exist.
- Product
- coredns
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
May 4, 2026BusyBox before commit 42202bf contains a heap buffer overflow vulnerability in the DHCPv6 client (udhcpc6) DNS_SERVERS option handler in networking/udhcp/d6_dhcCVE-2026-29004 · Other software · vda-linux · reported by VulnCheckHigh 7.2
BusyBox before commit 42202bf contains a heap buffer overflow vulnerability in the DHCPv6 client (udhcpc6) DNS_SERVERS option handler in networking/udhcp/d6_dhcpc.c that allows network-adjacent attackers to trigger memory corruption by sending a crafted DHCPv6 response with a malformed D6_OPT_DNS_SERVERS option. Attackers can exploit incorrect heap buffer allocation calculations in the option_to_env() function to cause denial of service or achieve arbitrary code execution on embedded systems without heap hardening.
- Product
- busybox_mirror
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
May 3, 2026An os command injection vulnerability exists in the DdnsSetting.cgi functionality of GeoVision LPC2011/LPC2211 1.10.CVE-2026-42364 · Other software · GeoVision Inc. · reported by 0df08a0e-a200-4957-9bb0-084f562506f9Critical 9.9
An os command injection vulnerability exists in the DdnsSetting.cgi functionality of GeoVision LPC2011/LPC2211 1.10. A specially crafted DDNS configuration can lead to arbitrary command execution. An attacker can modify a configuration value to trigger this vulnerability.
- Product
- GV-LPC2011/LPC2211
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordtalosintelligence.comgeovision.com.tw
May 1, 2026In the Linux kernel, the following vulnerability has been resolved: usb: cdns3: gadget: fix NULL pointer dereference in ep_queue When the gadget endpoint is dCVE-2026-31755 · Computers, phones & browsers · Linux · reported by 416baaa9-dc9f-4396-8d5f-8c081fb06d67Medium 5.5
In the Linux kernel, the following vulnerability has been resolved: usb: cdns3: gadget: fix NULL pointer dereference in ep_queue When the gadget endpoint is disabled or not yet configured, the ep->desc pointer can be NULL. This leads to a NULL pointer dereference when __cdns3_gadget_ep_queue() is called, causing a kernel crash. Add a check to return -ESHUTDOWN if ep->desc is NULL, which is the standard return code for unconfigured endpoints. This prevents potential crashes when ep_queue is called on endpoints that are not ready.
- Product
- Linux
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordgit.kernel.orggit.kernel.org
May 1, 2026In the Linux kernel, the following vulnerability has been resolved: usb: cdns3: gadget: fix state inconsistency on gadget init failure When cdns3_gadget_startCVE-2026-31754 · Computers, phones & browsers · Linux · reported by 416baaa9-dc9f-4396-8d5f-8c081fb06d67Medium 5.5
In the Linux kernel, the following vulnerability has been resolved: usb: cdns3: gadget: fix state inconsistency on gadget init failure When cdns3_gadget_start() fails, the DRD hardware is left in gadget mode while software state remains INACTIVE, creating hardware/software state inconsistency. When switching to host mode via sysfs: echo host > /sys/class/usb_role/13180000.usb-role-switch/role The role state is not set to CDNS_ROLE_STATE_ACTIVE due to the error, so cdns_role_stop() skips cleanup because state is still INACTIVE. This violates the DRD controller design specification (Figure22), which requires returning to idle state before switching roles. This leads to a synchronous external abort in xhci_gen_setup() when setting up the host controller: [ 516.440698] configfs-gadget 13180000.usb: failed to start g1: -19 [ 516.442035] cdns-usb3 13180000.usb: Failed to add gadget [ 516.443278] cdns-usb3 13180000.usb: set role 2 has failed ... [ 1301.375722] xhci-hcd xhci-hcd.1.auto: xHCI Host Controller [ 1301.377716] Internal error: synchronous external abort: 96000010 [#1] PREEMPT SMP [ 1301.382485] pc : xhci_gen_setup+0xa4/0x408 [ 1301.393391] backtrace: ... xhci_
- Product
- Linux
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordgit.kernel.orggit.kernel.org
Apr 30, 2026In Exim before 4.99.2, on systems using musl libc (not glibc), an attacker can crash the connection instance when malformed DNS data is present in PTR records.CVE-2026-40684 · Other software · Exim · reported by MITREMedium 5.9
In Exim before 4.99.2, on systems using musl libc (not glibc), an attacker can crash the connection instance when malformed DNS data is present in PTR records. This is caused by a dn_expand oddity in octal printing.
- Product
- Exim
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Apr 29, 2026A weakness has been identified in BurtTheCoder mcp-dnstwist up to 1.0.4.CVE-2026-7443 · Other software · BurtTheCoder · reported by VulDBMedium 5.5
A weakness has been identified in BurtTheCoder mcp-dnstwist up to 1.0.4. Affected by this vulnerability is the function fuzz_domain of the file src/index.ts of the component MCP Interface. Executing a manipulation of the argument Request can lead to os command injection. The attack may be launched remotely. The exploit has been made available to the public and could be used for attacks. The project was informed of the problem early through an issue report but has not responded yet.
- Product
- mcp-dnstwist
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Apr 29, 2026Tenda FH303/A300 firmware V5.07.68_EN contains a session weakness vulnerability that allows unauthenticated attackers to modify DNS settings by exploiting insufCVE-2018-25318 · Network & remote access · Tenda · reported by VulnCheckCritical 9.3
Tenda FH303/A300 firmware V5.07.68_EN contains a session weakness vulnerability that allows unauthenticated attackers to modify DNS settings by exploiting insufficient cookie validation. Attackers can send GET requests to the /goform/AdvSetDns endpoint with a crafted admin cookie to change DNS servers and redirect user traffic to malicious sites.
- Product
- FH303/A300
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordexploit-db.comvulncheck.com
Apr 29, 2026Tenda W3002R/A302/W309R wireless routers version V5.07.64_en contain a cookie session weakness vulnerability that allows unauthenticated attackers to modify DNSCVE-2018-25317 · Network & remote access · Tenda · reported by VulnCheckCritical 9.3
Tenda W3002R/A302/W309R wireless routers version V5.07.64_en contain a cookie session weakness vulnerability that allows unauthenticated attackers to modify DNS settings by exploiting insufficient session validation. Attackers can send GET requests to the /goform/AdvSetDns endpoint with a crafted admin language cookie to change primary and secondary DNS servers, redirecting user traffic to malicious DNS servers.
- Product
- W3002R
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordexploit-db.comvulncheck.com
Apr 29, 2026Tenda W308R v2 V5.07.48 contains a cookie session weakness vulnerability that allows unauthenticated attackers to modify DNS settings by exploiting insufficientCVE-2018-25316 · Network & remote access · Tenda · reported by VulnCheckCritical 9.3
Tenda W308R v2 V5.07.48 contains a cookie session weakness vulnerability that allows unauthenticated attackers to modify DNS settings by exploiting insufficient session validation. Attackers can send GET requests to the goform/AdvSetDns endpoint with a crafted admin language cookie to change DNS servers and redirect user traffic to malicious sites.
- Product
- W308R v2
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordexploit-db.comvulncheck.com
Apr 28, 2026OpenClaw before 2026.3.31 contains a wide-area discovery vulnerability allowing arbitrary tailnet peers to be accepted as DNS authorities.CVE-2026-41393 · Other software · OpenClaw · reported by VulnCheckMedium 5.9
OpenClaw before 2026.3.31 contains a wide-area discovery vulnerability allowing arbitrary tailnet peers to be accepted as DNS authorities. Attackers with same-tailnet position and CA-trusted endpoint access can exfiltrate operator credentials through DNS steering manipulation.
- Product
- OpenClaw
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Where this comes from: the exploited list is CISA’s Known Exploited Vulnerabilities catalog. Everything else is the whole National Vulnerability Database, where each record is published by the team that found the bug (Wordfence, Patchstack, WPScan, the vendors themselves and others); we show who. Exploit odds are FIRST’s EPSS, updated daily. Titles and categories are ours, so check the linked record before acting on a detail. For a write-up of the big ones, see our advisories. Every vendor, and every WordPress plugin and theme with a recorded flaw, also has its own page. All of it is free to reuse as JSON, CSV or RSS.
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