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

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
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
Nov 12, 2024Cisco Adaptive Security Appliance (ASA) Cross-Site Scripting (XSS) VulnerabilityCVE-2014-2120 · Network & remote access · Cisco · reported by psirt@cisco.comExploitedMedium 6.1
Cisco Adaptive Security Appliance (ASA) contains a cross-site scripting (XSS) vulnerability in the WebVPN login page. This vulnerability allows remote attackers to inject arbitrary web script or HTML via an unspecified parameter.
Product
Adaptive Security Appliance (ASA)
On CISA’s list since
Nov 12, 2024 (federal fix deadline Dec 3, 2024)
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 tools.cisco.com securityfocus.com
Oct 24, 2024Cisco ASA and FTD Denial-of-Service VulnerabilityCVE-2024-20481 · Network & remote access · Cisco · reported by psirt@cisco.comExploitedMedium 5.8
Cisco Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD) contain a missing release of resource after effective lifetime vulnerability that could allow an unauthenticated, remote attacker to cause a denial-of-service (DoS) of the RAVPN service.
Product
Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD)
On CISA’s list since
Oct 24, 2024 (federal fix deadline Nov 14, 2024)
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 24, 2024Cisco ASA and FTD Privilege Escalation VulnerabilityCVE-2024-20359 · Network & remote access · Cisco · reported by psirt@cisco.comExploitedMedium 6
Cisco Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD) contain a privilege escalation vulnerability that can allow local privilege escalation from Administrator to root.
Product
Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD)
On CISA’s list since
Apr 24, 2024 (federal fix deadline May 1, 2024)
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
Apr 24, 2024Cisco ASA and FTD Denial of Service VulnerabilityCVE-2024-20353 · Network & remote access · Cisco · reported by psirt@cisco.comExploitedHigh 8.6
Cisco Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD) contain an infinite loop vulnerability that can lead to remote denial of service condition.
Product
Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD)
On CISA’s list since
Apr 24, 2024 (federal fix deadline May 1, 2024)
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 15, 2024Cisco ASA and FTD Information Disclosure VulnerabilityCVE-2020-3259 · Network & remote access · Cisco · reported by psirt@cisco.comExploitedRansomwareHigh 7.5
Cisco Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD) contain an information disclosure vulnerability. An attacker could retrieve memory contents on an affected device, which could lead to the disclosure of confidential information due to a buffer tracking issue when the software parses invalid URLs that are requested from the web services interface. This vulnerability affects only specific AnyConnect and WebVPN configurations.
Product
Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD)
On CISA’s list since
Feb 15, 2024 (federal fix deadline Mar 7, 2024)
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 tools.cisco.com tools.cisco.com
Sep 13, 2023Cisco Adaptive Security Appliance and Firepower Threat Defense Unauthorized Access VulnerabilityCVE-2023-20269 · Network & remote access · Cisco · reported by psirt@cisco.comExploitedRansomwareMedium 5
Cisco Adaptive Security Appliance and Firepower Threat Defense contain an unauthorized access vulnerability that could allow an unauthenticated, remote attacker to conduct a brute force attack in an attempt to identify valid username and password combinations or establish a clientless SSL VPN session with an unauthorized user.
Product
Adaptive Security Appliance and Firepower Threat Defense
On CISA’s list since
Sep 13, 2023 (federal fix deadline Oct 4, 2023)
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 sec.cloudapps.cisco.com
May 24, 2022Cisco Adaptive Security Appliance (ASA) SNMP Buffer Overflow VulnerabilityCVE-2016-6366 · Network & remote access · Cisco · reported by psirt@cisco.comExploitedHigh 8.8
A buffer overflow vulnerability in the Simple Network Management Protocol (SNMP) code of Cisco ASA software could allow an attacker to cause a reload of the affected system or to remotely execute code.
Product
Adaptive Security Appliance (ASA)
On CISA’s list since
May 24, 2022 (federal fix deadline Jun 14, 2022)
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 blogs.cisco.com tools.cisco.com
May 24, 2022Cisco Adaptive Security Appliance (ASA) CLI Remote Code Execution VulnerabilityCVE-2016-6367 · Network & remote access · Cisco · reported by psirt@cisco.comExploitedHigh 7.8
A vulnerability in the command-line interface (CLI) parser of Cisco ASA software could allow an authenticated, local attacker to create a denial-of-service (DoS) condition or potentially execute code.
Product
Adaptive Security Appliance (ASA)
On CISA’s list since
May 24, 2022 (federal fix deadline Jun 14, 2022)
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 blogs.cisco.com tools.cisco.com
Nov 3, 2021Cisco ASA and FTD Read-Only Path Traversal VulnerabilityCVE-2020-3452 · Network & remote access · Cisco · reported by psirt@cisco.comExploitedHigh 7.5
Cisco Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD) contain an improper input validation vulnerability when HTTP requests process URLs. An attacker could exploit this vulnerability by sending a crafted HTTP request containing directory traversal character sequences to an affected device. A successful exploit could allow the attacker to view arbitrary files within the web services file system on the targeted device.
Product
Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD)
On CISA’s list since
Nov 3, 2021 (federal fix deadline May 3, 2022)
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 packetstormsecurity.com packetstormsecurity.com
Nov 3, 2021Cisco ASA and FTD Cross-Site Scripting (XSS) VulnerabilityCVE-2020-3580 · Network & remote access · Cisco · reported by psirt@cisco.comExploitedRansomwareMedium 6.1
Cisco Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD) contain an insufficient input validation vulnerability for user-supplied input by the web services interface. Successful exploitation could allow an attacker to perform cross-site scripting (XSS) in the context of the interface or access sensitive browser-based information.
Product
Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD)
On CISA’s list since
Nov 3, 2021 (federal fix deadline May 3, 2022)
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 tools.cisco.com tools.cisco.com
Nov 3, 2021Cisco Adaptive Security Appliance (ASA) Denial-of-Service VulnerabilityCVE-2018-0296 · Network & remote access · Cisco · reported by psirt@cisco.comExploitedHigh 7.5
Cisco Adaptive Security Appliance (ASA) contains an improper input validation vulnerability with HTTP URLs. Exploitation could allow an attacker to cause a denial-of-service (DoS) condition or information disclosure.
Product
Adaptive Security Appliance (ASA)
On CISA’s list since
Nov 3, 2021 (federal fix deadline May 3, 2022)
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 packetstormsecurity.com securityfocus.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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