# Cisco Secure Firewall Adaptive Security Appliance Software vulnerabilities Source: https://junglewise.ai/threats/technologies/secure-firewall-adaptive-security-appliance-software Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats Updated: 11 November 2026, 03:07 UTC. Rebuilt every hour. Data: https://junglewise.ai/threats/technologies/secure-firewall-adaptive-security-appliance-software.json License: CC BY 4.0 with a link back Junglewise Threat Intelligence has tracked 6 vulnerabilities in Cisco Secure Firewall Adaptive Security Appliance Software: 0 in the last 7 days and 4 in the last 90 days, 1 of them critical and 0 exploited in the wild. The most recent, CVE-2026-20334, was published on 16 September 2026. Nothing in the last four weeks, down from 4 vulnerabilities in the four before. 0 critical against 1. ## Counts - Last 7 days: 0 - Last 30 days: 0 - Last 90 days: 4 - All time: 6 (1 critical, 0 exploited in the wild) ## About Cisco Secure Firewall Adaptive Security Appliance Software Cisco network firewall software providing packet filtering and access control capabilities. ## Latest Cisco Secure Firewall Adaptive Security Appliance Software vulnerabilities - [CVE-2026-20334: Cisco Secure Firewall improper adherence to coding standards](https://junglewise.ai/threats/cve-2026-20334-cisco-secure-firewall-improper-adherence-to-coding-standards) (high, CVSS 8.4, published 16 Sep 2026) - [CVE-2026-20333: Cisco Secure Firewall ASA/FTD/FMC incorrect comparison in security context](https://junglewise.ai/threats/cve-2026-20333-cisco-secure-firewall-asa-ftd-fmc-incorrect-comparison-in) (high, CVSS 8.8, published 16 Sep 2026) - [CVE-2026-20249: Cisco Secure Firewall IKEv2 certificate authentication denial of service](https://junglewise.ai/threats/cve-2026-20249-cisco-secure-firewall-ikev2-certificate-authentication-denial-of) (high, CVSS 8.6, published 16 Sep 2026) - [CVE-2026-20330: Cisco Secure Firewall improper input validation in ASA, FTD, and FMC](https://junglewise.ai/threats/cve-2026-20330-cisco-secure-firewall-improper-input-validation-in-asa-ftd-and) (critical, CVSS 9.9, published 16 Sep 2026) - [CVE-2026-20100: Cisco Secure Firewall ASA and FTD Remote Access SSL VPN denial of service](https://junglewise.ai/threats/cve-2026-20100-cisco-secure-firewall-asa-and-ftd-remote-access-ssl-vpn-denial-of) (high, CVSS 7.7, published 4 Mar 2026) - [CVE-2026-20073: Cisco Secure Firewall ASA and FTD access control bypass](https://junglewise.ai/threats/cve-2026-20073-cisco-secure-firewall-asa-and-ftd-access-control-bypass) (medium, CVSS 5.8, published 4 Mar 2026) ## Most severe Cisco Secure Firewall Adaptive Security Appliance Software vulnerabilities - [CVE-2026-20330: Cisco Secure Firewall improper input validation in ASA, FTD, and FMC](https://junglewise.ai/threats/cve-2026-20330-cisco-secure-firewall-improper-input-validation-in-asa-ftd-and) (critical, CVSS 9.9, published 16 Sep 2026) - [CVE-2026-20333: Cisco Secure Firewall ASA/FTD/FMC incorrect comparison in security context](https://junglewise.ai/threats/cve-2026-20333-cisco-secure-firewall-asa-ftd-fmc-incorrect-comparison-in) (high, CVSS 8.8, published 16 Sep 2026) - [CVE-2026-20249: Cisco Secure Firewall IKEv2 certificate authentication denial of service](https://junglewise.ai/threats/cve-2026-20249-cisco-secure-firewall-ikev2-certificate-authentication-denial-of) (high, CVSS 8.6, published 16 Sep 2026) - [CVE-2026-20334: Cisco Secure Firewall improper adherence to coding standards](https://junglewise.ai/threats/cve-2026-20334-cisco-secure-firewall-improper-adherence-to-coding-standards) (high, CVSS 8.4, published 16 Sep 2026) - [CVE-2026-20100: Cisco Secure Firewall ASA and FTD Remote Access SSL VPN denial of service](https://junglewise.ai/threats/cve-2026-20100-cisco-secure-firewall-asa-and-ftd-remote-access-ssl-vpn-denial-of) (high, CVSS 7.7, published 4 Mar 2026) - [CVE-2026-20073: Cisco Secure Firewall ASA and FTD access control bypass](https://junglewise.ai/threats/cve-2026-20073-cisco-secure-firewall-asa-and-ftd-access-control-bypass) (medium, CVSS 5.8, published 4 Mar 2026) ## Vulnerabilities per week Nothing in the last four weeks, down from 4 vulnerabilities in the four before. 0 critical against 1. | Week of | Vulns | Critical | Exploited | | --- | --- | --- | --- | | 17 Aug 2026 | 0 | 0 | 0 | | 24 Aug 2026 | 0 | 0 | 0 | | 31 Aug 2026 | 0 | 0 | 0 | | 7 Sep 2026 | 0 | 0 | 0 | | 14 Sep 2026 | 4 | 1 | 0 | | 21 Sep 2026 | 0 | 0 | 0 | | 28 Sep 2026 | 0 | 0 | 0 | | 5 Oct 2026 | 0 | 0 | 0 | | 12 Oct 2026 | 0 | 0 | 0 | | 19 Oct 2026 | 0 | 0 | 0 | | 26 Oct 2026 | 0 | 0 | 0 | | 2 Nov 2026 | 0 | 0 | 0 | | 9 Nov 2026 | 0 | 0 | 0 | ## Other Cisco technologies - [Cisco IOS](https://junglewise.ai/threats/technologies/ios): 70 vulnerabilities - [Cisco Identity Services Engine](https://junglewise.ai/threats/technologies/identity-services-engine): 58 vulnerabilities - [Cisco IOS XE](https://junglewise.ai/threats/technologies/ios-xe): 57 vulnerabilities - [Cisco Firepower Threat Defense](https://junglewise.ai/threats/technologies/firepower-threat-defense): 33 vulnerabilities - [Cisco Firepower Threat Defense Software](https://junglewise.ai/threats/technologies/firepower-threat-defense-software): 33 vulnerabilities - [Cisco IOS XR](https://junglewise.ai/threats/technologies/ios-xr): 31 vulnerabilities - [Cisco IOS XE Software](https://junglewise.ai/threats/technologies/ios-xe-software): 28 vulnerabilities - [Cisco Adaptive Security Appliance Software](https://junglewise.ai/threats/technologies/secure-firewall-asa-software): 23 vulnerabilities - [Cisco Snort 3](https://junglewise.ai/threats/technologies/snort-3): 20 vulnerabilities - [Cisco Ios Software](https://junglewise.ai/threats/technologies/ios-software): 19 vulnerabilities - [Cisco ISE Passive Identity Connector](https://junglewise.ai/threats/technologies/ise-passive-identity-connector): 19 vulnerabilities - [Cisco Secure Firewall Management Center](https://junglewise.ai/threats/technologies/secure-firewall-management-center): 16 vulnerabilities ## Sources NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "Cisco Secure Firewall Adaptive Security Appliance Software vulnerabilities", https://junglewise.ai/threats/technologies/secure-firewall-adaptive-security-appliance-software, 11 November 2026.