Adaptive Security Appliance Software vulnerabilitiesAnd the versions its exploited flaws hit.
Adaptive Security Appliance Software is made by Cisco. We track 324 published vulnerabilities in it, across 1,062 versions. 13 of them are on the list of flaws known to be exploited, the newest added on 25 September 2025. If you run Adaptive Security Appliance Software, check your version against the exploited flaws below and patch those first.
The most recent Adaptive Security Appliance Software flaw added to the known-exploited list is CVE-2025-20333, on 25 September 2025. We keep watching the known-exploited list.
Which versions of Adaptive Security Appliance Software do the exploited flaws hit?
Each exploited flaw lists the versions it affects, usually as ranges. "9.12 to before 9.12.4.72" means from 9.12 up to, but not including, 9.12.4.72. Find your version, then patch.
- CVE-2025-20333Exploited list, 25 Sep 2025
Cisco Secure Firewall Adaptive Security Appliance (ASA) and Secure Firewall Threat Defense (FTD) Buffer Overflow Vulnerability
9.12 to before 9.12.4.729.14 to before 9.14.4.289.16 to before 9.16.4.859.17.0 to before 9.17.1.459.18 to before 9.18.4.479.19 to before 9.19.1.379.20 to before 9.20.3.79.22 to before 9.22.1.3 - CVE-2025-20362Exploited list, 25 Sep 2025
Cisco Secure Firewall Adaptive Security (ASA) Appliance and Secure Firewall Threat Defense (FTD) Missing Authorization Vulnerability
9.12 to before 9.12.4.729.14 to before 9.14.4.289.16 to before 9.16.4.859.17.0 to before 9.18.4.679.19 to before 9.20.4.109.22 to before 9.22.2.149.23 to before 9.23.1.19 - CVE-2024-20481Exploited list, 24 Oct 2024
Cisco ASA and FTD Denial-of-Service Vulnerability
9.8.19.8.1.59.8.1.79.8.29.8.2.89.8.2.149.8.2.159.8.2.17 - CVE-2024-20353Exploited list, 24 Apr 2024
Cisco ASA and FTD Denial of Service Vulnerability
9.8.19.8.1.59.8.1.79.8.29.8.2.89.8.2.149.8.2.159.8.2.17 - CVE-2024-20359Exploited list, 24 Apr 2024
Cisco ASA and FTD Privilege Escalation Vulnerability
9.8.19.8.1.59.8.1.79.8.29.8.2.89.8.2.149.8.2.159.8.2.17 - CVE-2020-3259Exploited list, 15 Feb 2024
Cisco ASA and FTD Information Disclosure Vulnerability
9.8 to before 9.8.4.209.9 to before 9.9.2.679.10 to before 9.10.1.409.12 to before 9.12.3.99.13 to before 9.13.1.10 - CVE-2023-20269Exploited list, 13 Sep 2023
Cisco Adaptive Security Appliance and Firepower Threat Defense Unauthorized Access Vulnerability
9.8.19.8.1.59.8.1.79.8.29.8.2.89.8.2.149.8.2.159.8.2.17 - CVE-2016-6366Exploited list, 24 May 2022
Cisco Adaptive Security Appliance (ASA) SNMP Buffer Overflow Vulnerability
7.2.1 to before 9.0.4.409.1.1 to before 9.1.7(9)9.2.0 to before 9.2.4(14)9.3.0 to before 9.3.3(10)9.4.0.115 to before 9.4.3(8)9.6.0 to before 9.6.1(11) - CVE-2016-6367Exploited list, 24 May 2022
Cisco Adaptive Security Appliance (ASA) CLI Remote Code Execution Vulnerability
7.2.0 to before 8.4(3)8.5 to before 9.0(1) - CVE-2020-3452Exploited list, 3 Nov 2021
Cisco ASA and FTD Read-Only Path Traversal Vulnerability
9.6 to before 9.6.4.429.8 to before 9.8.4.209.9 to before 9.9.2.749.10 to before 9.10.1.429.12 to before 9.12.3.129.13 to before 9.13.1.109.14 to before 9.14.1.10 - CVE-2018-0296Exploited list, 3 Nov 2021
Cisco Adaptive Security Appliance (ASA) Denial-of-Service Vulnerability
8.1(2.5)9.1 to before 9.1.7.299.2 to before 9.2.4.339.3 to before 9.4.4.189.5 to before 9.6.4.89.7 to before 9.7.1.249.8 to before 9.8.2.289.9 to before 9.9.2.1 - CVE-2020-3580Exploited list, 3 Nov 2021
Cisco ASA and FTD Cross-Site Scripting (XSS) Vulnerability
before 9.8.4.349.9 to before 9.9.2.859.10 to before 9.12.4.139.13 to before 9.13.1.219.14 to before 9.14.2.89.15 to before 9.15.1.15
1 more exploited flaw names Adaptive Security Appliance Software without a version of its own, for example as the system other affected software runs on. It is in the list below.
Which Adaptive Security Appliance Software vulnerabilities are being exploited?
13 flaws are on the government list of vulnerabilities known to be exploited. These are the ones criminals are using now, so they go first, whatever their severity score says.
- 9.9Cisco Secure Firewall Adaptive Security Appliance (ASA) and Secure Firewall Threat Defense (FTD) Buffer Overflow Vulnerability
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.
- 6.5Cisco Secure Firewall Adaptive Security (ASA) Appliance and Secure Firewall Threat Defense (FTD) Missing Authorization Vulnerability
Cisco Secure Firewall Adaptive Security (ASA) Appliance and Secure Firewall Threat Defense (FTD) Software VPN Web Server contain a missing authorization vulnerability.
- 6.1Cisco Adaptive Security Appliance (ASA) Cross-Site Scripting (XSS) Vulnerability
Cisco Adaptive Security Appliance (ASA) contains a cross-site scripting (XSS) vulnerability in the WebVPN login page.
- 5.8Cisco ASA and FTD Denial-of-Service Vulnerability
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...
- 8.6Cisco ASA and FTD Denial of Service Vulnerability
Cisco Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD) contain an infinite loop vulnerability that can lead to remote denial of service condition.
- 6.0Cisco ASA and FTD Privilege Escalation Vulnerability
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.
- 7.5Cisco ASA and FTD Information Disclosure Vulnerability
Cisco Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD) contain an information disclosure vulnerability.
- 5.0Cisco Adaptive Security Appliance and Firepower Threat Defense Unauthorized Access Vulnerability
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...
Which Adaptive Security Appliance Software flaws are most likely to be used?
Ranked by the latest exploit-likelihood forecast: the chance each flaw is used in an attack in the next 30 days. A high severity score on its own doesn't tell you that. Flaws shared by many other makers' products are left out.
- >99%
A vulnerability in the web services interface of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to conduct directory...
- >99%
A vulnerability in the web interface of the Cisco Adaptive Security Appliance (ASA) could allow an unauthenticated, remote attacker to cause an affected device to reload unexpectedly, resulting in a denial of service...
- 97%CVE-2020-3187Critical
A vulnerability in the web services interface of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to conduct directory...
- 88%
Buffer overflow in Cisco Adaptive Security Appliance (ASA) Software through 9.4.2.3 on ASA 5500, ASA 5500-X, ASA Services Module, ASA 1000V, ASAv, Firepower 9300 ASA Security Module, PIX, and FWSM devices allows...
- 87%
Update: On November 5, 2025, Cisco became aware of a new attack variant against devices running Cisco Secure ASA Software or Cisco Secure FTD Software releases that are affected by CVE-2025-20333 and CVE-2025-20362.
- 87%CVE-2018-0101Critical
A vulnerability in the Secure Sockets Layer (SSL) VPN functionality of the Cisco Adaptive Security Appliance (ASA) Software could allow an unauthenticated, remote attacker to cause a reload of the affected system or...
- 86%
Multiple vulnerabilities in the web services interface of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to conduct...
- 72%
A vulnerability in the web services interface of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to retrieve memory...
- 71%
A vulnerability in the VPN web server of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow an authenticated, remote attacker to...
Running Adaptive Security Appliance Software? We'll keep checking.
Looking flaws up one at a time doesn't scale. Tell us what you run once, and we tell you which flaws matter to you, in what order, and keep watching for new ones.
- Tell us what you runPick your software from a list, or let us work it out from your website.
- We match it to every flawOver 400,000 published flaws, checked against your list.
- Ranked by real-world riskA 0 to 100 score, led by evidence criminals are using it.
- Told as soon as we knowAn alert by email, in the app or by webhook to your own tools.
Free plan, no card needed. Nothing to install.
1 flaw being exploited affects software Acme tracks
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.
- Matched to
- Adaptive Security Appliance Software on Acme's software list
- What to do
- Patch first, then check for signs of use
Sent to the alert recipients Acme chose. Also in the app and to Acme's webhook.
We track 324 published vulnerabilities listed under the name Adaptive Security Appliance Software, across 1,062 versions. The most recent Adaptive Security Appliance Software flaw added to the known-exploited list is CVE-2025-20333, on 25 September 2025.
13 are on the list of flaws known to be exploited. The most recently added are CVE-2025-20333, CVE-2025-20362 and CVE-2014-2120.
Each flaw names its own versions, usually as ranges. The newest, CVE-2025-20333, affects 9.12 to before 9.12.4.72, 9.14 to before 9.14.4.28, 9.16 to before 9.16.4.85, 9.17.0 to before 9.17.1.45 and more. The versions for every exploited flaw are listed on this page.
Create a Precursor Intelligence account and track Adaptive Security Appliance Software. We match it against every published flaw, give each one a risk score from 0 to 100 and keep watching, so you hear about new ones as soon as we know, by email, in the app or by webhook.