CVE-2026-76478

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

State: Published
Severity: 8.8 High
Published: Oct 21, 2026
Updated: Oct 22, 2026
Reserved: Aug 19, 2026

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-2026-76478 are related to improper access control issues that are grouped under the Common Weakness Enumeration (CWE) Pillar CWE-284.

Scores

CVSS	Score	Vector	Source
3.1	8.8 High	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H	cisco

Weaknesses

CWE-284 Improper Access Control

Affected Products

Product	Versions
Cisco Emergency ResponderCisco	14Affected 14SU1Affected 14SU2Affected 14SU3Affected 14SU3aAffected 15Affected 15SU1Affected 15SU1aAffected 14SU4Affected 15SU2Affected 15SU3Affected 14SU5Affected 15SU4Affected 14SU6Affected
Cisco Unified Communications ManagerCisco	14Affected 14SU1Affected 14SU2Affected 14SU3Affected 15Affected 15SU1Affected 14SU4Affected 14SU4aAffected 15SU1aAffected 15SU2Affected 15.0.1.13010-1Affected 15.0.1.13011-1Affected 15.0.1.13012-1Affected 15.0.1.13013-1Affected 15.0.1.13014-1Affected 15.0.1.13015-1Affected 15.0.1.13016-1Affected 15.0.1.13017-1Affected 15SU3aAffected 14SU5Affected 15SU4Affected 15SU4aAffected 14SU6Affected
Cisco Unified Communications Manager IM and Presence ServiceCisco	14Affected 14SU1Affected 14SU2Affected 14SU2aAffected 14SU3Affected 15Affected 15SU1Affected 14SU4Affected 15SU2Affected 15SU3Affected 14SU5Affected 15SU4Affected 14SU6Affected
Cisco Unity ConnectionCisco	14Affected 14SU1Affected 14SU2Affected 14SU3Affected 14SU3aAffected 15Affected 15SU1Affected 14SU4Affected 15SU2Affected 15SU3Affected 14SU5Affected 15SU4Affected 14SU6Affected

References

cisco-sa-voice-hardening-twgbH9e3

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