CVE-2026-76478: Cisco Unified Communications Products Hardening Release: October 2026 - Improper Access Control Vulnerabilities
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-2026-76478 are related to improper access control issues that are grouped under the Common Weakness Enumeration (CWE) Pillar CWE-284.
Affected Software
Event History
Frequently Asked Questions
What level of access does an attacker need to exploit this issue?
The vector indicates that exploitation requires local access and low privileges. No user interaction is required.
What impact could successful exploitation have?
The supplied metrics indicate high impact to confidentiality, integrity, and availability, with a scope change.
Which products are identified as affected?
The listed products are Cisco Emergency Responder, Cisco Prime Collaboration Deployment, Cisco Unified Communications Manager, Unified CM IM & Presence Service, Unified CM Session Management Edition, and Cisco Unity Connection.