Updated 3 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

14 results

Sep 9, 2026Cisco Firewall Management Center Authentication Bypass Using an Alternate Path or Channel VulnerabilityCVE-2026-20079 · Network & remote access · Cisco · reported by psirt@cisco.comExploitedCritical 10
Cisco Secure Firewall Management Center (FMC) Software and Cisco Security Cloud Control (SCC) Firewall Management contain an authentication Bypass using an alternate path or channel vulnerability that could allow an unauthenticated, remote attacker to bypass authentication and execute script files on an affected device to obtain root access to the underlying operating system.
Product
Secure Firewall Management Center (FMC) and Security Cloud Control (SCC) Firewall Management
On CISA’s list since
Sep 9, 2026 (federal fix deadline Sep 12, 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 seclists.org
Aug 11, 2026Cisco Secure Firewall Adaptive Security Appliance (ASA) and Secure Firewall Threat Defense (FTD) Heap Inspection VulnerabilityCVE-2026-20349 · Network & remote access · Cisco · reported by psirt@cisco.comExploitedHigh 8.6
Cisco Secure Firewall Adaptive Security Appliance (ASA) and Secure Firewall Threat Defense (FTD) contain a heap inspection vulnerability that could allow an unauthenticated, remote attacker to cause the device to reload unexpectedly, resulting in a denial of service (DoS) condition.
Product
Secure Firewall Adaptive Security Appliance (ASA) and Secure Firewall Threat Defense (FTD)
On CISA’s list since
Aug 11, 2026 (federal fix deadline Aug 14, 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
Jul 29, 2026Cisco Secure Firewall Management Center Use of Hard-coded Password VulnerabilityCVE-2026-20316 · Network & remote access · Cisco · reported by psirt@cisco.comExploitedRansomwareMedium 5.3
Cisco Secure Firewall Management Center (FMC) formerly known as Firepower Management Center contains a use of hard-coded password vulnerability that could allow an unauthenticated, remote attacker to log in to an affected device using a low-privileged account to access sensitive data within the impacted systems.
Product
Secure Firewall Management Center (FMC)
On CISA’s list since
Jul 29, 2026 (federal fix deadline Aug 1, 2026)
What to do
Attackers are using this now. Install Cisco’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 sec.cloudapps.cisco.com cisa.gov
Mar 19, 2026Cisco Secure Firewall Management Center (FMC) Software and Cisco Security Cloud Control (SCC) Firewall Management Deserialization of Untrusted Data VulnerabilityCVE-2026-20131 · Network & remote access · Cisco · reported by psirt@cisco.comExploitedRansomwareCritical 10
Cisco Secure Firewall Management Center (FMC) Software and Cisco Security Cloud Control (SCC) Firewall Management contain a deserialization of untrusted data vulnerability in the web-based management interface that could allow an unauthenticated, remote attacker to execute arbitrary Java code as root on an affected device.
Product
Secure Firewall Management Center (FMC)
On CISA’s list since
Mar 19, 2026 (federal fix deadline Mar 22, 2026)
What to do
Attackers are using this now. Install Cisco’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 sec.cloudapps.cisco.com aws.amazon.com
Sep 25, 2025Cisco Secure Firewall Adaptive Security (ASA) Appliance and Secure Firewall Threat Defense (FTD) Missing Authorization VulnerabilityCVE-2025-20362 · Network & remote access · Cisco · reported by psirt@cisco.comExploitedMedium 6.5
Cisco Secure Firewall Adaptive Security (ASA) Appliance and Secure Firewall Threat Defense (FTD) Software VPN Web Server contain a missing authorization vulnerability. This vulnerability could be chained with CVE-2025-20333.
Product
Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense
On CISA’s list since
Sep 25, 2025 (federal fix deadline Sep 26, 2025)
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 sec.cloudapps.cisco.com
Sep 25, 2025Cisco Secure Firewall Adaptive Security Appliance (ASA) and Secure Firewall Threat Defense (FTD) Buffer Overflow VulnerabilityCVE-2025-20333 · Network & remote access · Cisco · reported by psirt@cisco.comExploitedCritical 9.9
Cisco Secure Firewall Adaptive Security (ASA) Appliance and Secure Firewall Threat Defense (FTD) Software VPN Web Server contain a buffer overflow vulnerability that allows for remote code execution. This vulnerability could be chained with CVE-2025-20362.
Product
Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense
On CISA’s list since
Sep 25, 2025 (federal fix deadline Sep 26, 2025)
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 sec.cloudapps.cisco.com
Feb 6, 2025Sophos XG Firewall Buffer Overflow VulnerabilityCVE-2020-15069 · Network & remote access · Sophos · reported by MITREExploitedCritical 9.8
Sophos XG Firewall contains a buffer overflow vulnerability that allows for remote code execution via the "HTTP/S bookmark" feature.
Product
XG Firewall
On CISA’s list since
Feb 6, 2025 (federal fix deadline Feb 27, 2025)
What to do
Attackers are using this now. Install Sophos’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.sophos.com community.sophos.com
Dec 3, 2024Zyxel Multiple Firewalls Path Traversal VulnerabilityCVE-2024-11667 · Network & remote access · Zyxel · reported by security@zyxel.com.twExploitedRansomwareHigh 7.5
Multiple Zyxel firewalls contain a path traversal vulnerability in the web management interface that could allow an attacker to download or upload files via a crafted URL.
Product
Multiple Firewalls
On CISA’s list since
Dec 3, 2024 (federal fix deadline Dec 24, 2024)
What to do
Attackers are using this now. Install Zyxel’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 zyxel.com cisa.gov
Jun 5, 2023Zyxel Multiple Firewalls Buffer Overflow VulnerabilityCVE-2023-33009 · Network & remote access · Zyxel · reported by security@zyxel.com.twExploitedCritical 9.8
Zyxel ATP, USG FLEX, USG FLEX 50(W), USG20(W)-VPN, VPN, and ZyWALL/USG firewalls contain a buffer overflow vulnerability in the notification function that could allow an unauthenticated attacker to cause denial-of-service (DoS) conditions and remote code execution on an affected device.
Product
Multiple Firewalls
On CISA’s list since
Jun 5, 2023 (federal fix deadline Jun 26, 2023)
What to do
Attackers are using this now. Install Zyxel’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 zyxel.com zyxel.com
Jun 5, 2023Zyxel Multiple Firewalls Buffer Overflow VulnerabilityCVE-2023-33010 · Network & remote access · Zyxel · reported by security@zyxel.com.twExploitedCritical 9.8
Zyxel ATP, USG FLEX, USG FLEX 50(W), USG20(W)-VPN, VPN, and ZyWALL/USG firewalls contain a buffer overflow vulnerability in the ID processing function that could allow an unauthenticated attacker to cause denial-of-service (DoS) conditions and remote code execution on an affected device.
Product
Multiple Firewalls
On CISA’s list since
Jun 5, 2023 (federal fix deadline Jun 26, 2023)
What to do
Attackers are using this now. Install Zyxel’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 zyxel.com zyxel.com
May 31, 2023Zyxel Multiple Firewalls OS Command Injection VulnerabilityCVE-2023-28771 · Network & remote access · Zyxel · reported by security@zyxel.com.twExploitedCritical 9.8
Zyxel ATP, USG FLEX, VPN, and ZyWALL/USG firewalls allow for improper error message handling which could allow an unauthenticated attacker to execute OS commands remotely by sending crafted packets to an affected device.
Product
Multiple Firewalls
On CISA’s list since
May 31, 2023 (federal fix deadline Jun 21, 2023)
What to do
Attackers are using this now. Install Zyxel’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 packetstormsecurity.com zyxel.com
Sep 23, 2022Sophos Firewall Code Injection VulnerabilityCVE-2022-3236 · Network & remote access · Sophos · reported by security-alert@sophos.comExploitedCritical 9.8
A code injection vulnerability in the User Portal and Webadmin of Sophos Firewall allows for remote code execution.
Product
Firewall
On CISA’s list since
Sep 23, 2022 (federal fix deadline Oct 14, 2022)
What to do
Attackers are using this now. Install Sophos’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 sophos.com sophos.com
May 16, 2022Zyxel Multiple Firewalls OS Command Injection VulnerabilityCVE-2022-30525 · Network & remote access · Zyxel · reported by security@zyxel.com.twExploitedCritical 9.8
A command injection vulnerability in the CGI program of some Zyxel firewall versions could allow an attacker to modify specific files and then execute some OS commands on a vulnerable device.
Product
Multiple Firewalls
On CISA’s list since
May 16, 2022 (federal fix deadline Jun 6, 2022)
What to do
Attackers are using this now. Install Zyxel’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 packetstormsecurity.com packetstormsecurity.com
Mar 31, 2022Sophos Firewall Authentication Bypass VulnerabilityCVE-2022-1040 · Network & remote access · Sophos · reported by security-alert@sophos.comExploitedCritical 9.8
An authentication bypass vulnerability in User Portal and Webadmin of Sophos Firewall allows for remote code execution.
Product
Firewall
On CISA’s list since
Mar 31, 2022 (federal fix deadline Apr 21, 2022)
What to do
Attackers are using this now. Install Sophos’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 packetstormsecurity.com exploit-db.com

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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Vulnerability database

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