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.

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Changed

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Cisco Cisco Emergency Responder unknown
Version Status Constraints
14 affected —
14SU1 affected —
14SU2 affected —
14SU3 affected —
14SU3a affected —
15 affected —
15SU1 affected —
15SU1a affected —
14SU4 affected —
15SU2 affected —
15SU3 affected —
14SU5 affected —
15SU4 affected —
14SU6 affected —
Cisco Cisco Unified Communications Manager unknown
Version Status Constraints
14 affected —
14SU1 affected —
14SU2 affected —
14SU3 affected —
15 affected —
15SU1 affected —
14SU4 affected —
14SU4a affected —
15SU1a affected —
15SU2 affected —
15.0.1.13010-1 affected —
15.0.1.13011-1 affected —
15.0.1.13012-1 affected —
15.0.1.13013-1 affected —
15.0.1.13014-1 affected —
15.0.1.13015-1 affected —
15.0.1.13016-1 affected —
15.0.1.13017-1 affected —
15SU3a affected —
14SU5 affected —
15SU4 affected —
15SU4a affected —
14SU6 affected —
Cisco Cisco Unified Communications Manager IM and Presence Service unknown
Version Status Constraints
14 affected —
14SU1 affected —
14SU2 affected —
14SU2a affected —
14SU3 affected —
15 affected —
15SU1 affected —
14SU4 affected —
15SU2 affected —
15SU3 affected —
14SU5 affected —
15SU4 affected —
14SU6 affected —
Cisco Cisco Unity Connection unknown
Version Status Constraints
14 affected —
14SU1 affected —
14SU2 affected —
14SU3 affected —
14SU3a affected —
15 affected —
15SU1 affected —
14SU4 affected —
15SU2 affected —
15SU3 affected —
14SU5 affected —
15SU4 affected —
14SU6 affected —

No data.

No data.

OpenCVE Enrichment is a feature of OpenCVE that uses AI to automatically link vendors and products to CVEs. Learn more on GitHub.

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Project Subscriptions

No data.

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-voice-hardening-twgbH9e3 cve-icon cve-icon
History

Wed, 21 Oct 2026 17:15:00 +0000

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 & 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.
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'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: cisco

Published:

Updated: 2026-10-21T16:15:47.937Z

Reserved: 2026-08-19T12:02:03.639Z

Link: CVE-2026-76478

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-10-21T17:19:07.650

Modified: 2026-10-21T18:54:37.403

Link: CVE-2026-76478

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-21T21:15:16Z

Weaknesses