CVE-2026-76491 Cisco Expressway Series Software Hardening Release: October 2026 - Denial of Service Vulnerabilities
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-76491?
CVE-2026-76491 is a high-severity vulnerability in Cisco TelePresence Video Communication Server (VCS) Expressway, published on 21 Oct 2026.
Official description
As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Expressway Series software engineering team has conducted a comprehensive internal security review. This review resulted in software hardening releases that address multiple internally discovered vulnerabilities. The vulnerabilities tracked by CVE-2026-76491 are related to issues concerning reachable assertions that are grouped under the Common Weakness Enumeration (CWE) Base CWE-617.
Weakness: CWE-617
Which versions are affected by CVE-2026-76491?
How do I fix CVE-2026-76491?
No fix has been published for CVE-2026-76491 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-76491 being exploited?
There is no known exploitation of CVE-2026-76491 in the wild and no public exploit code.
Sources
Also known as GHSA-qw7h-fjr8-4575.