Updated 5 h ago

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.

1,762exploited flaws on CISA’s list

34added in the last 30 days

344new WordPress flaws this week

390,080entries in the database

678 results · page 1 of 14

Oct 23, 2026Collabora Online – Built-in CODE Server OS Command Injection VulnerabilityCVE-2026-110447 · Other software · Collabora · reported by MITREExploitedCritical 9.2
Collabora Collabora Online – Built-in CODE Server when used within the NextCloud platform contains an OS command injection vulnerability that allows for remote code execution when the CODE server isn't running.
Product
Collabora Online – Built-in CODE Server
On CISA’s list since
Oct 23, 2026 (federal fix deadline Oct 26, 2026)
What to do
Attackers are using this now. Install Collabora’s update today. If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD record CISA catalog github.com help.nextcloud.com
Oct 20, 2026EG Secure Solutions SiteGuard Server Edition OS Command Injection VulnerabilityCVE-2026-106931 · Other software · EG Secure Solutions · reported by vultures@jpcert.or.jpExploitedHigh 8.5
EG Secure Solutions SiteGuard Server Edition contains an OS command injection vulnerability which may allow an attacker to execute arbitrary OS commands with root or SYSTEM privileges on the system running the affected product.
Product
SiteGuard Server Edition
On CISA’s list since
Oct 20, 2026 (federal fix deadline Oct 23, 2026)
What to do
Attackers are using this now. Install EG Secure Solutions’s update today. If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD record CISA catalog jvn.jp eg-secure.co.jp
Oct 14, 2026Palo Alto Networks PAN-OS Code Injection VulnerabilityCVE-2026-0322 · Network & remote access · Palo Alto Networks · reported by psirt@paloaltonetworks.comExploitedHigh 8.6
Palo Alto Networks PAN-OS contains a code injection vulnerability that could allow an authenticated attacker with network access to execute arbitrary code with root privileges on the firewall.
Product
PAN-OS
On CISA’s list since
Oct 14, 2026 (federal fix deadline Oct 17, 2026)
What to do
Attackers are using this now. Install Palo Alto Networks’s update today. If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD record CISA catalog security.paloaltonetworks.com cisa.gov
Oct 13, 2026Microsoft Windows Command Injection VulnerabilityCVE-2026-96951 · Computers, phones & browsers · Microsoft · reported by secure@microsoft.comExploitedHigh 8.8
Microsoft Windows Shell contains a command injection vulnerability that allows an unauthorized attacker to bypass a security feature over a network.
Product
Windows
On CISA’s list since
Oct 13, 2026 (federal fix deadline Oct 16, 2026)
What to do
Attackers are using this now. Install Microsoft’s update today. If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD record CISA catalog msrc.microsoft.com cisa.gov
Sep 25, 2026Mikrotik RouterOS Improper Enforcement of Behavioral Workflow VulnerabilityCVE-2026-67279 · Network & remote access · MikroTik · reported by cvd@cert.plExploitedMedium 6.9
Mikrotik RouterOS contains an improper enforcement of behavioral workflow vulnerability that could allow an unauthenticated client to open a session channel and send an exec request. This vulnerability can be chained to achieve unauthenticated exploitation of CVE-2026-86060.
Product
RouterOS
On CISA’s list since
Sep 25, 2026 (federal fix deadline Sep 28, 2026)
What to do
Attackers are using this now. Install MikroTik’s update today. If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD record CISA catalog cert.pl cert.pl
Sep 25, 2026Microsoft SharePoint Code Injection VulnerabilityCVE-2026-65660 · Email & office · Microsoft · reported by secure@microsoft.comExploitedHigh 8.8
Microsoft SharePoint contains a code injection vulnerability which could allow an authorized attacker to execute code over a network.
Product
SharePoint
On CISA’s list since
Sep 25, 2026 (federal fix deadline Sep 28, 2026)
What to do
Attackers are using this now. Install Microsoft’s update today. If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD record CISA catalog msrc.microsoft.com blog.previdian.com
Sep 10, 2026MikroTik RouterOS Improper Neutralization of Argument Delimiters in a Command VulnerabilityCVE-2026-86060 · Network & remote access · MikroTik · reported by cvd@cert.plExploitedCritical 9.2
MikroTik RouterOS contains an improper neutralization of argument delimiters in a command vulnerability which allows an attacker to change the trusted RouterOS policy mask, leading to privilege escalation.
Product
RouterOS
On CISA’s list since
Sep 10, 2026 (federal fix deadline Sep 13, 2026)
What to do
Attackers are using this now. Install MikroTik’s update today. If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD record CISA catalog cert.pl cert.pl
Sep 10, 2026MikroTik RouterOS Missing Authentication for Critical Function VulnerabilityCVE-2026-67277 · Network & remote access · MikroTik · reported by cvd@cert.plExploitedHigh 8.8
MikroTik RouterOS contains a missing authentication for critical function vulnerability which allows kernel memory disclosure and denial of service in the btest service.
Product
RouterOS
On CISA’s list since
Sep 10, 2026 (federal fix deadline Sep 13, 2026)
What to do
Attackers are using this now. Install MikroTik’s update today. If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD record CISA catalog cert.pl cert.pl
Sep 8, 2026Microsoft Windows Link Following VulnerabilityCVE-2026-81963 · Computers, phones & browsers · Microsoft · reported by secure@microsoft.comExploitedHigh 7.8
Microsoft Windows Update Stack contains a link following vulnerability that allows a local attacker to escalate privileges locally up to SYSTEM.
Product
Windows
On CISA’s list since
Sep 8, 2026 (federal fix deadline Sep 22, 2026)
What to do
Attackers are using this now. Install Microsoft’s update today. If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD record CISA catalog msrc.microsoft.com cisa.gov
Sep 8, 2026Microsoft Windows Heap-Based Buffer Overflow VulnerabilityCVE-2026-85880 · Computers, phones & browsers · Microsoft · reported by secure@microsoft.comExploitedHigh 7.8
Microsoft Windows Advanced Local Procedure Call contains a heap-based buffer overflow vulnerability that allows an attacker to elevate privileges locally.
Product
Windows
On CISA’s list since
Sep 8, 2026 (federal fix deadline Sep 22, 2026)
What to do
Attackers are using this now. Install Microsoft’s update today. If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD record CISA catalog msrc.microsoft.com cisa.gov
Sep 2, 2026Kestra OSS OS Command Injection VulnerabilityCVE-2026-49869 · Other software · Kestra · reported by GitHubExploitedCritical 10
Kestra OSS contains an OS command injection vulnerability that could allow an unauthenticated remote attacker to create and execute arbitrary workflows without credentials.
Product
Kestra OSS
On CISA’s list since
Sep 2, 2026 (federal fix deadline Sep 5, 2026)
What to do
Attackers are using this now. Install Kestra’s update today. If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD record CISA catalog github.com github.com
Sep 2, 2026SonicWall SMA1000 Appliances OS Command Injection VulnerabilityCVE-2026-83549 · Network & remote access · SonicWall · reported by PSIRT@sonicwall.comExploitedHigh 7.8
SonicWall SMA1000 Appliances contains an OS command injection vulnerability that could enable a remote authenticated attacker as administrator to execute arbitrary OS commands, resulting in remote code execution.
Product
SMA1000 Appliances
On CISA’s list since
Sep 2, 2026 (federal fix deadline Sep 5, 2026)
What to do
Attackers are using this now. Install SonicWall’s update today. If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD record CISA catalog psirt.global.sonicwall.com cisa.gov
Aug 26, 2026Microsoft SQL Server Remote Code Execution VulnerabilityCVE-2019-1068 · Computers, phones & browsers · Microsoft · reported by secure@microsoft.comExploitedHigh 8.8
Microsoft SQL Server contains a remote code execution vulnerability that could allow an attacker to execute code in the context of the SQL Server Database Engine service account.
Product
SQL Server
On CISA’s list since
Aug 26, 2026 (federal fix deadline Aug 29, 2026)
What to do
Attackers are using this now. Install Microsoft’s update today. If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD record CISA catalog portal.msrc.microsoft.com portal.msrc.microsoft.com
Aug 21, 2026Zimbra Collaboration Suite (ZCS) OS Command Injection VulnerabilityCVE-2026-73570 · Email & office · Synacor · reported by MITREExploitedHigh 8.9
Zimbra Collaboration Suite (ZCS) contains an OS command injection vulnerability which could allow an unauthenticated attacker to send specially crafted SMTP requests that may result in execution of arbitrary operating system commands as the Zimbra user.
Product
Zimbra Collaboration Suite (ZCS)
On CISA’s list since
Aug 21, 2026 (federal fix deadline Aug 24, 2026)
What to do
Attackers are using this now. Install Synacor’s update today. If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD record CISA catalog wiki.zimbra.com wiki.zimbra.com
Aug 18, 2026Microsoft Internet Key Exchange (IKE) Service Extensions Double Free VulnerabilityCVE-2026-33824 · Email & office · Microsoft · reported by secure@microsoft.comExploitedCritical 9.8
Microsoft Internet Key Exchange (IKE) Service Extensions contains a double free vulnerability that could enable remote code execution.
Product
Internet Key Exchange (IKE) Service Extensions
On CISA’s list since
Aug 18, 2026 (federal fix deadline Aug 21, 2026)
What to do
Attackers are using this now. Install Microsoft’s update today. If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD record CISA catalog msrc.microsoft.com unit42.paloaltonetworks.com
Aug 18, 2026Microsoft SharePoint Weak Authentication VulnerabilityCVE-2026-55040 · Email & office · Microsoft · reported by secure@microsoft.comExploitedCritical 9.1
Microsoft SharePoint contains a weak authentication vulnerability which allows an unauthorized attacker to bypass a security feature over a network.
Product
SharePoint
On CISA’s list since
Aug 18, 2026 (federal fix deadline Aug 21, 2026)
What to do
Attackers are using this now. Install Microsoft’s update today. If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD record CISA catalog msrc.microsoft.com github.com
Aug 18, 2026Apple macOS Improper Authentication VulnerabilityCVE-2026-65400 · Computers, phones & browsers · Apple · reported by product-security@apple.comExploitedCritical 9.8
Apple macOS contains an improper authentication vulnerability that could allow an attacker on the network to authenticate to Screen Sharing without valid credentials.
Product
macOS
On CISA’s list since
Aug 18, 2026 (federal fix deadline Aug 21, 2026)
What to do
Attackers are using this now. Install Apple’s update today. If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD record CISA catalog support.apple.com support.apple.com
Aug 11, 2026Microsoft Windows Ancillary Function Driver for WinSock Use-After-Free VulnerabilityCVE-2026-68820 · Computers, phones & browsers · Microsoft · reported by secure@microsoft.comExploitedHigh 7
Microsoft Windows Ancillary Function Driver for WinSock contains a use-after-free vulnerability that allows an authorized attacker to elevate privileges locally.
Product
Windows Ancillary Function Driver for WinSock
On CISA’s list since
Aug 11, 2026 (federal fix deadline Aug 25, 2026)
What to do
Attackers are using this now. Install Microsoft’s update today. If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD record CISA catalog msrc.microsoft.com cisa.gov
Jul 27, 2026Fortinet FortiOS Exposure of Sensitive Information to an Unauthorized Actor VulnerabilityCVE-2025-68686 · Network & remote access · Fortinet · reported by psirt@fortinet.comExploitedMedium 5.9
Fortinet FortiOS contains an exposure of sensitive information to an unauthorized actor vulnerability. This may allow a remote unauthenticated attacker to bypass the patch developed for the symbolic link persistency mechanism observed in some post-exploit cases, via crafted HTTP requests. An attacker would need first to have compromised the product via another vulnerability, at filesystem level.
Product
FortiOS
On CISA’s list since
Jul 27, 2026 (federal fix deadline Aug 10, 2026)
What to do
Attackers are using this now. Install Fortinet’s update today. If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD record CISA catalog fortiguard.fortinet.com cisa.gov
Jul 27, 2026Arista VeloCloud Orchestrator On-Prem OS Command Injection VulnerabilityCVE-2026-16812 · Other software · Arista · reported by psirt@arista.comExploitedCritical 10
Arista VeloCloud Orchestrator On-Prem contains an OS command injection vulnerability that may allow a remote attacker to access privileged internal functionality and impact the VCO host. Successful exploitation may compromise the confidentiality, integrity, and availability of the orchestrator and data managed by the orchestrator.
Product
VeloCloud Orchestrator
On CISA’s list since
Jul 27, 2026 (federal fix deadline Jul 30, 2026)
What to do
Attackers are using this now. Install Arista’s update today. If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD record CISA catalog arista.com cisa.gov
Jul 22, 2026Microsoft SharePoint Deserialization of Untrusted Data Vulnerability CVE-2026-50522 · Email & office · Microsoft · reported by secure@microsoft.comExploitedCritical 9.8
Microsoft SharePoint contains a deserialization of untrusted data vulnerability which could allow an unauthorized attacker to execute code over a network.
Product
SharePoint
On CISA’s list since
Jul 22, 2026 (federal fix deadline Jul 25, 2026)
What to do
Attackers are using this now. Install Microsoft’s update today. If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD record CISA catalog msrc.microsoft.com cisa.gov
Jul 16, 2026Microsoft SharePoint Deserialization of Untrusted Data VulnerabilityCVE-2026-58644 · Email & office · Microsoft · reported by secure@microsoft.comExploitedCritical 9.8
Microsoft SharePoint contains a deserialization of untrusted data vulnerability that allows an unauthorized attacker to execute code over a network.
Product
SharePoint
On CISA’s list since
Jul 16, 2026 (federal fix deadline Jul 19, 2026)
What to do
Attackers are using this now. Install Microsoft’s update today. If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD record CISA catalog msrc.microsoft.com cisa.gov
Jul 16, 2026Fortinet FortiSandbox OS Command Injection VulnerabilityCVE-2026-25089 · Network & remote access · Fortinet · reported by psirt@fortinet.comExploitedCritical 9.8
Fortinet FortiSandbox, FortiSandbox Cloud, and FortiSandbox PaaS contain an OS command injection vulnerability that allows an unauthenticated attacker to execute unauthorized commands via specifically crafted HTTP requests.
Product
FortiSandbox
On CISA’s list since
Jul 16, 2026 (federal fix deadline Jul 19, 2026)
What to do
Attackers are using this now. Install Fortinet’s update today. If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD record CISA catalog fortiguard.fortinet.com cisa.gov
Jul 16, 2026Fortinet FortiSandbox OS Command Injection VulnerabilityCVE-2026-39808 · Network & remote access · Fortinet · reported by psirt@fortinet.comExploitedCritical 9.8
Fortinet FortiSandbox contains an OS command injection vulnerability that could allow an unauthenticated attacker to execute unauthorized code or commands via crafted HTTP requests.
Product
FortiSandbox
On CISA’s list since
Jul 16, 2026 (federal fix deadline Jul 19, 2026)
What to do
Attackers are using this now. Install Fortinet’s update today. If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD record CISA catalog fortiguard.fortinet.com github.com
Jul 14, 2026Microsoft Active Directory Federation Services Insufficient Granularity of Access Control Vulnerability CVE-2026-56155 · Computers, phones & browsers · Microsoft · reported by secure@microsoft.comExploitedHigh 7.8
Microsoft Active Directory Federation Services contains an insufficient granularity of access control vulnerability that allows an authorized attacker to elevate privileges locally.
Product
Active Directory Federation Services
On CISA’s list since
Jul 14, 2026 (federal fix deadline Jul 28, 2026)
What to do
Attackers are using this now. Install Microsoft’s update today. If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD record CISA catalog msrc.microsoft.com cisa.gov
Jul 14, 2026Microsoft SharePoint Server Missing Authentication for Critical Function VulnerabilityCVE-2026-56164 · Email & office · Microsoft · reported by secure@microsoft.comExploitedMedium 5.3
Microsoft SharePoint contains a missing authentication for critical function vulnerability that allows an unauthorized attacker to elevate privileges over a network.
Product
SharePoint Server
On CISA’s list since
Jul 14, 2026 (federal fix deadline Jul 17, 2026)
What to do
Attackers are using this now. Install Microsoft’s update today. If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD record CISA catalog msrc.microsoft.com cisa.gov
Jul 13, 2026Cisco IOS Cross-Site Request Forgery VulnerabilityCVE-2008-4128 · Network & remote access · Cisco · reported by MITREExploitedHigh 8.1
Cisco IOS 12.4 contains multiple cross-site forgery vulnerabilities that allows remote attackers to execute arbitrary commands via (1) a certain "show privilege" command to the /level/15/exec/- URI, and (2) a certain "alias exec" command to the /level/15/exec/-/configure/http URI.
Product
IOS
On CISA’s list since
Jul 13, 2026 (federal fix deadline Jul 16, 2026)
What to do
Attackers are using this now. Install Cisco’s update today. If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD record CISA catalog jbrownsec.blogspot.com securityfocus.com
Jul 1, 2026Microsoft SharePoint Server Deserialization of Untrusted Data VulnerabilityCVE-2026-45659 · Email & office · Microsoft · reported by secure@microsoft.comExploitedRansomwareHigh 8.8
Microsoft SharePoint Server contains a deserialization of untrusted data vulnerability which allows an authorized attacker to execute code over a network.
Product
SharePoint Server
On CISA’s list since
Jul 1, 2026 (federal fix deadline Jul 4, 2026)
What to do
Attackers are using this now. Install Microsoft’s update today (ransomware groups use this one). If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD record CISA catalog msrc.microsoft.com cisa.gov
Jun 23, 2026Ubiquiti UniFi OS Improper Input Validation VulnerabilityCVE-2026-34910 · Network & remote access · Ubiquiti · reported by support@hackerone.comExploitedCritical 10
Ubiquiti UniFi OS contains an improper input validation vulnerability which could allow a malicious actor with access to the network to conduct command injection.
Product
UniFi OS
On CISA’s list since
Jun 23, 2026 (federal fix deadline Jun 26, 2026)
What to do
Attackers are using this now. Install Ubiquiti’s update today. If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD record CISA catalog community.ui.com cisa.gov
Jun 23, 2026Ubiquiti UniFi OS Path Traversal VulnerabilityCVE-2026-34909 · Network & remote access · Ubiquiti · reported by support@hackerone.comExploitedCritical 10
Ubiquiti UniFi OS contains a path traversal vulnerability which could allow a malicious actor with access to the network to access files on the underlying system that could be manipulated to access an underlying account.
Product
UniFi OS
On CISA’s list since
Jun 23, 2026 (federal fix deadline Jun 26, 2026)
What to do
Attackers are using this now. Install Ubiquiti’s update today. If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD record CISA catalog community.ui.com cisa.gov
Jun 23, 2026Ubiquiti UniFi OS Improper Access Control VulnerabilityCVE-2026-34908 · Network & remote access · Ubiquiti · reported by support@hackerone.comExploitedCritical 10
Ubiquiti UniFi OS contains an improper access control vulnerability which could allow a malicious actor with access to the network to make unauthorized changes to the system.
Product
UniFi OS
On CISA’s list since
Jun 23, 2026 (federal fix deadline Jun 26, 2026)
What to do
Attackers are using this now. Install Ubiquiti’s update today. If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD record CISA catalog community.ui.com cisa.gov
Jun 11, 2026Ivanti Sentry OS Command Injection VulnerabilityCVE-2026-10520 · Network & remote access · Ivanti · reported by 3c1d8aa1-5a33-4ea4-8992-aadd6440af75ExploitedCritical 10
Ivanti Sentry (formerly known as MobileIron Sentry) contains an OS command injection vulnerability which could allow a remote unauthenticated user to achieve root-level remote code execution. This vulnerability can be successfully exploited in cases where the Sentry appliance is in an unmanaged state with its endpoints externally reachable. The use of mTLS with EPMM or restricted HTTPS access through Neurons for MDM makes interfaces inaccessible to external actors.
Product
Sentry
On CISA’s list since
Jun 11, 2026 (federal fix deadline Jun 14, 2026)
What to do
Attackers are using this now. Install Ivanti’s update today. If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD record CISA catalog hub.ivanti.com github.com
May 29, 2026Palo Alto Networks PAN-OS Authentication Bypass VulnerabilityCVE-2026-0257 · Network & remote access · Palo Alto Networks · reported by psirt@paloaltonetworks.comExploitedRansomwareHigh 7.8
Palo Alto Networks PAN-OS contains an authentication bypass vulnerability that allows attackers to bypass security restrictions and establish an unauthorized VPN connection.
Product
PAN-OS
On CISA’s list since
May 29, 2026 (federal fix deadline Jun 1, 2026)
What to do
Attackers are using this now. Install Palo Alto Networks’s update today (ransomware groups use this one). If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD record CISA catalog security.paloaltonetworks.com cert-portal.siemens.com
May 20, 2026Microsoft Defender Denial of Service VulnerabilityCVE-2026-45498 · Computers, phones & browsers · Microsoft · reported by secure@microsoft.comExploitedMedium 4
Microsoft Defender contains an unspecified vulnerability that allows for denial of service.
Product
Defender
On CISA’s list since
May 20, 2026 (federal fix deadline Jun 3, 2026)
What to do
Attackers are using this now. Install Microsoft’s update today. If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD record CISA catalog msrc.microsoft.com cisa.gov
May 20, 2026Microsoft Windows Buffer Overflow VulnerabilityCVE-2008-4250 · Computers, phones & browsers · Microsoft · reported by secure@microsoft.comExploitedCritical 9.8
Microsoft Windows contains a buffer overflow vulnerability in the Windows Server Service that allows remote attackers to execute arbitrary code via a crafted RPC request that triggers an overflow during path canonicalization.
Product
Windows
On CISA’s list since
May 20, 2026 (federal fix deadline Jun 3, 2026)
What to do
Attackers are using this now. Install Microsoft’s update today. If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD record CISA catalog blogs.securiteam.com marc.info
May 20, 2026Microsoft DirectX NULL Byte Overwrite VulnerabilityCVE-2009-1537 · Computers, phones & browsers · Microsoft · reported by secure@microsoft.comExploitedHigh 8.8
Microsoft DirectX contains a NULL byte overwrite vulnerability in the QuickTime Movie Parser Filter in quartz.dll in DirectShow which could allow remote attackers to execute arbitrary code via a crafted QuickTime media file.
Product
DirectX
On CISA’s list since
May 20, 2026 (federal fix deadline Jun 3, 2026)
What to do
Attackers are using this now. Install Microsoft’s update today. If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD record CISA catalog blogs.technet.com blogs.technet.com
May 20, 2026Microsoft Internet Explorer Use-After-Free VulnerabilityCVE-2010-0249 · Computers, phones & browsers · Microsoft · reported by secure@microsoft.comExploitedHigh 8.8
Microsoft Internet Explorer contains an use-after-free vulnerability that could allow remote attackers to execute arbitrary code by accessing a pointer associated with a deleted object. The impacted product could be end-of-life (EoL) and/or end-of-service (EoS). Users should discontinue product utilization.
Product
Internet Explorer
On CISA’s list since
May 20, 2026 (federal fix deadline Jun 3, 2026)
What to do
Attackers are using this now. Install Microsoft’s update today. If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD record CISA catalog blogs.technet.com news.cnet.com
May 20, 2026Microsoft Internet Explorer Use-After-Free VulnerabilityCVE-2010-0806 · Computers, phones & browsers · Microsoft · reported by secure@microsoft.comExploitedHigh 8.8
Microsoft Internet Explorer contains an use-after-free vulnerability that could allow remote attackers to execute arbitrary code via vectors involving access to an invalid pointer after the deletion of an object. The impacted product could be end-of-life (EoL) and/or end-of-service (EoS). Users should discontinue product utilization.
Product
Internet Explorer
On CISA’s list since
May 20, 2026 (federal fix deadline Jun 3, 2026)
What to do
Attackers are using this now. Install Microsoft’s update today. If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD record CISA catalog blogs.technet.com osvdb.org
May 20, 2026Microsoft Defender Link Following VulnerabilityCVE-2026-41091 · Computers, phones & browsers · Microsoft · reported by secure@microsoft.comExploitedHigh 7.8
Microsoft Defender contains a link following vulnerability that allows an authorized attacker to elevate privileges locally.
Product
Defender
On CISA’s list since
May 20, 2026 (federal fix deadline Jun 3, 2026)
What to do
Attackers are using this now. Install Microsoft’s update today. If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD record CISA catalog msrc.microsoft.com cisa.gov
May 15, 2026Microsoft Exchange Server Cross-Site Scripting VulnerabilityCVE-2026-42897 · Computers, phones & browsers · Microsoft · reported by secure@microsoft.comExploitedHigh 8.1
Microsoft Exchange Server contains a cross-site scripting vulnerability during web page generation in Outlook Web Access and when certain interaction conditions are met, arbitrary JavaScript can be executed in the browser context.
Product
Microsoft
On CISA’s list since
May 15, 2026 (federal fix deadline May 29, 2026)
What to do
Attackers are using this now. Install Microsoft’s update today. If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD record CISA catalog msrc.microsoft.com cisa.gov
May 6, 2026Palo Alto Networks PAN-OS Out-of-bounds Write VulnerabilityCVE-2026-0300 · Network & remote access · Palo Alto Networks · reported by psirt@paloaltonetworks.comExploitedCritical 9.3
Palo Alto Networks PAN-OS contains an out-of-bounds write vulnerability in the User-ID Authentication Portal (aka Captive Portal) service that can allow an unauthenticated attacker to execute arbitrary code with root privileges on the PA-Series and VM-Series firewalls by sending specially crafted packets.
Product
PAN-OS
On CISA’s list since
May 6, 2026 (federal fix deadline May 9, 2026)
What to do
Attackers are using this now. Install Palo Alto Networks’s update today. If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD record CISA catalog security.paloaltonetworks.com cert-portal.siemens.com
Apr 30, 2026WebPros cPanel & WHM and WP2 (WordPress Squared) Missing Authentication for Critical Function VulnerabilityCVE-2026-41940 · WordPress plugins & themes · reported by VulnCheckExploitedRansomwareCritical 9.3
WebPros cPanel & WHM (WebHost Manager) and WP2 (WordPress Squared) contain an authentication bypass vulnerability in the login flow that allows unauthenticated remote attackers to gain unauthorized access to the control panel.
Product
cPanel & WHM and WP2 (WordPress Squared)
On CISA’s list since
Apr 30, 2026 (federal fix deadline May 3, 2026)
What to do
Attackers are using this now. Install WebPros’s update today (ransomware groups use this one). If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD record CISA catalog docs.cpanel.net docs.wpsquared.com
Apr 28, 2026Microsoft Windows Protection Mechanism Failure VulnerabilityCVE-2026-32202 · Computers, phones & browsers · Microsoft · reported by secure@microsoft.comExploitedMedium 4.3
Microsoft Windows Shell contains a protection mechanism failure vulnerability that allows an unauthorized attacker to perform spoofing over a network.
Product
Windows
On CISA’s list since
Apr 28, 2026 (federal fix deadline May 12, 2026)
What to do
Attackers are using this now. Install Microsoft’s update today. If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD record CISA catalog msrc.microsoft.com vicarius.io
Apr 22, 2026Microsoft Defender Insufficient Granularity of Access Control VulnerabilityCVE-2026-33825 · Computers, phones & browsers · Microsoft · reported by secure@microsoft.comExploitedRansomwareHigh 7.8
Microsoft Defender contains an insufficient granularity of access control vulnerability that could allow an authorized attacker to escalate privileges locally.
Product
Defender
On CISA’s list since
Apr 22, 2026 (federal fix deadline May 6, 2026)
What to do
Attackers are using this now. Install Microsoft’s update today (ransomware groups use this one). If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD record CISA catalog msrc.microsoft.com cisa.gov
Apr 20, 2026Cisco Catalyst SD-WAN Manager Exposure of Sensitive Information to an Unauthorized Actor VulnerabilityCVE-2026-20133 · Network & remote access · Cisco · reported by psirt@cisco.comExploitedMedium 6.5
Cisco Catalyst SD-WAN Manager contains an exposure of sensitive information to an unauthorized actor vulnerability that could allow remote attackers to view sensitive information on affected systems.
Product
Catalyst SD-WAN Manager
On CISA’s list since
Apr 20, 2026 (federal fix deadline Apr 23, 2026)
What to do
Attackers are using this now. Install Cisco’s update today. If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD record CISA catalog sec.cloudapps.cisco.com cisa.gov
Apr 20, 2026Synacor Zimbra Collaboration Suite (ZCS) Cross-site Scripting VulnerabilityCVE-2025-48700 · Email & office · Synacor · reported by MITREExploitedMedium 6.1
Synacor Zimbra Collaboration Suite (ZCS) contains a cross-site scripting vulnerability that could allow attackers to execute arbitrary JavaScript within the user's session, potentially leading to unauthorized access to sensitive information.
Product
Zimbra Collaboration Suite (ZCS)
On CISA’s list since
Apr 20, 2026 (federal fix deadline Apr 23, 2026)
What to do
Attackers are using this now. Install Synacor’s update today. If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD record CISA catalog wiki.zimbra.com wiki.zimbra.com
Apr 14, 2026Microsoft Office Remote Code ExecutionCVE-2009-0238 · Email & office · Microsoft · reported by secure@microsoft.comExploitedHigh 8.8
Microsoft Office Excel contains a remote code execution vulnerability that could allow an attacker to take complete control of an affected system if a user opens a specially crafted Excel file that includes a malformed object.
Product
Office
On CISA’s list since
Apr 14, 2026 (federal fix deadline Apr 28, 2026)
What to do
Attackers are using this now. Install Microsoft’s update today. If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD record CISA catalog blogs.zdnet.com isc.sans.org
Apr 14, 2026Microsoft SharePoint Server Improper Input Validation VulnerabilityCVE-2026-32201 · Email & office · Microsoft · reported by secure@microsoft.comExploitedMedium 6.5
Microsoft SharePoint Server contains an improper input validation vulnerability that allows an unauthorized attacker to perform spoofing over a network.
Product
SharePoint Server
On CISA’s list since
Apr 14, 2026 (federal fix deadline Apr 28, 2026)
What to do
Attackers are using this now. Install Microsoft’s update today. If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD record CISA catalog msrc.microsoft.com cisa.gov
Apr 13, 2026Microsoft Visual Basic for Applications Insecure Library Loading VulnerabilityCVE-2012-1854 · Computers, phones & browsers · Microsoft · reported by secure@microsoft.comExploitedHigh 7.8
Microsoft Visual Basic for Applications (VBA) contains an insecure library loading vulnerability that could allow for remote code execution.
Product
Visual Basic for Applications (VBA)
On CISA’s list since
Apr 13, 2026 (federal fix deadline Apr 27, 2026)
What to do
Attackers are using this now. Install Microsoft’s update today. If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD record CISA catalog us-cert.gov docs.microsoft.com
Apr 13, 2026Microsoft Windows Link Following VulnerabilityCVE-2025-60710 · Computers, phones & browsers · Microsoft · reported by secure@microsoft.comExploitedRansomwareHigh 7.8
Microsoft Windows contains a link following vulnerability that allows for privilege escalation
Product
Windows
On CISA’s list since
Apr 13, 2026 (federal fix deadline Apr 27, 2026)
What to do
Attackers are using this now. Install Microsoft’s update today (ransomware groups use this one). If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD record CISA catalog msrc.microsoft.com vicarius.io

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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