CVE-2026-76476 Cisco Unified Communications Products Hardening Release: October 2026 - Improper Input Validation Vulnerabilities
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-76476?
CVE-2026-76476 is a high-severity vulnerability in Cisco Emergency Responder, published on 21 Oct 2026.
Official description
As part of Cisco's ongoing commitment to proactive security and product quality, engineering teams for Cisco Emergency Responder, Cisco Prime Collaboration Deployment, Cisco Unified Communications Manager (Unified CM), Cisco Unified Communications Manager IM & Presence Service (Unified CM IM&P), Cisco Unified Communications Manager Session Management Edition (Unified CM SME), and Cisco Unity Connection have conducted a comprehensive internal security review. This review resulted in software hardening releases that address multiple internally discovered vulnerabilities. The vulnerabilities tracked by CVE-2026-76476 are related to issues concerning improper input validation that are grouped under the Common Weakness Enumeration (CWE) Class CWE-20.
Weakness: CWE-20
Which versions are affected by CVE-2026-76476?
How do I fix CVE-2026-76476?
No fix has been published for CVE-2026-76476 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-76476 being exploited?
There is no known exploitation of CVE-2026-76476 in the wild and no public exploit code.
Sources
Also known as GHSA-pwvw-8g2w-9j7r.