CVE-2026-76418 Cisco Secure Firewall ASA Software and Cisco Secure FTD Software Unchecked Return Value to NULL Pointer Dereference
- Exploited in the wild
- Since 29 Oct 2026
- Fix
- None listed
What is CVE-2026-76418?
CVE-2026-76418 is a high-severity vulnerability in Cisco Secure Firewall Adaptive Security Appliance (ASA) Software, published on 28 Oct 2026.
Official description
A vulnerability in the Remote Access SSL VPN service of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause the device to reload unexpectedly, resulting in a denial of service (DoS) condition. This vulnerability is due to logic errors when secondary authentication is configured on a tunnel group. An attacker could exploit this vulnerability by sending a crafted request when connecting to the SSL remote access VPN. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition.
Weakness: CWE-690
Which versions are affected by CVE-2026-76418?
How do I fix CVE-2026-76418?
No fix has been published for CVE-2026-76418 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 1 Nov 2026.
Is CVE-2026-76418 being exploited?
Yes. Attackers have exploited CVE-2026-76418 in the wild since at least 29 Oct 2026.
Sources
Also known as GHSA-3whv-82g3-5cwx.