CVE-2026-76478

Cisco Unified Communications Products Hardening Release: October 2026 - Improper Access Control Vulnerabilities

Published Oct 21, 2026 CVSS 3.1 · 8.8 High EPSS < 1% KEV · Not listed
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 &amp; Presence Service (Unified CM IM&amp;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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Cisco
Cisco cisco Unified Communications Manager
Cisco emergency Responder
Cisco unified Communications Manager Im And Presence Service
Cisco unity Connection
Vendors & Products Cisco
Cisco cisco Unified Communications Manager
Cisco emergency Responder
Cisco unified Communications Manager Im And Presence Service
Cisco unity Connection
Type Values Removed Values Added
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 &amp; Presence Service (Unified CM IM&amp;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.
Title Cisco Unified Communications Products Hardening Release: October 2026 - Improper Access Control Vulnerabilities
Weaknesses CWE-284
References
Metrics cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
cisco
Published
Updated
Nov 7, 2026, 5:29 PM
Reserved
Aug 19, 2026, 12:02 PM
Status
Awaiting Analysis
Published
Oct 21, 2026, 5:19 PM
Modified
Nov 7, 2026, 6:17 PM