ASA / Firepower Threat Defense 9.24 vulnerabilities

8 advisories affect Cisco ASA / Firepower Threat Defense 9.24, 3 already exploited by attackers. Latest: October 29, 2026.

Running ASA / Firepower Threat Defense 9.24 devices? Get an email when a new vulnerability comes out. Free, unsubscribe in one click.
Turn on ASA / Firepower Threat Defense 9.24 alerts

Vulnerability	Severity	Affected versions
Cisco Secure Firewall ASA Software and Cisco Secure FTD Software Unchecked Return Value to NULL Pointer Dereference Vulnerability CVE-2026-76418 · October 29, 2026	High 8.6 Exploited	7 versions, from 9.24.1 to 9.24.10
Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense Software Remote Access SSL VPN Tunnel Denial of Service Vulnerability CVE-2026-76418 · October 28, 2026	High 8.6 Exploited	7 versions, from 9.24.1 to 9.24.10
Cisco Secure Firewall Adaptive Security Appliance, Secure Firewall Threat Defense, and Secure Firewall Management Center Software Hardening Release: September 2026 CVE-2026-20329 +7 · September 18, 2026	Critical 9.9	6 versions, from 9.24.1 to 9.24.10
Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense Software for Secure Firewall 3100 and 4200 Series DTLS Denial of Service Vulnerability CVE-2026-20250 · September 18, 2026	High 8.6	9.24.1
Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense Software IKEv2 Certificate Authentication Denial of Service Vulnerability CVE-2026-20249 · September 18, 2026	High 8.6	4 versions, from 9.24.1 to 9.24.1.155
Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense Software EIGRP Denial of Service Vulnerability CVE-2026-20222 · September 18, 2026	High 7.4	5 versions, from 9.24.1 to 9.24.1.155
Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense Software TCP DNS Denial of Service Vulnerability CVE-2026-20248 · September 18, 2026	Medium 6.8	5 versions, from 9.24.1 to 9.24.1.155
Cisco Secure Firewall Adaptive Security Appliance (ASA) and Secure Firewall Threat Defense (FTD) Heap Inspection Vulnerability CVE-2026-20349 · August 11, 2026	High 8.6 Exploited	5 versions, from 9.24.1 to 9.24.1.155

Affected versions are compiled automatically from vendor advisories and NVD and may contain errors. Where no fixed version is shown, you will find it in the official advisory linked from every page: check it there before updating.

Other ASA / Firepower Threat Defense versions: 10.1 · 10.0 · 9.23 · 9.22 · 9.20 · 9.19 · 9.18 · 9.17 · 9.16 · 9.15 · 9.14 · 9.12 · 9.8 · 7.7 · 7.6 · 7.4 · 7.3 · 7.2 · 7.1 · 7.0 · 6.7 · 6.6 · 6.4 · 6.2