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

CVE-2026-76478 · CVE Program · October 21, 2026

Summary

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.

From CVE record (written by the reporting organization), quoted as published. Check the source before acting.

Affected products

VendorProductAffected versionsFixed
CiscoCisco Emergency Responder14, 14SU1, 14SU2, 14SU3, 14SU3a, 15, 15SU1, 15SU1a, 14SU4, 15SU2, 15SU3, 14SU5, 15SU4, 14SU6—
CiscoCisco Unified Communications Manager14, 14SU1, 14SU2, 14SU3, 15, 15SU1, 14SU4, 14SU4a, 15SU1a, 15SU2, 15.0.1.13010-1, 15.0.1.13011-1, 15.0.1.13012-1, 15.0.1.13013-1, 15.0.1.13014-1, 15.0.1.13015-1, 15.0.1.13016-1, 15.0.1.13017-1, 15SU3a, 14SU5—
CiscoCisco Unified Communications Manager IM and Presence Service14, 14SU1, 14SU2, 14SU2a, 14SU3, 15, 15SU1, 14SU4, 15SU2, 15SU3, 14SU5, 15SU4, 14SU6—
CiscoCisco Unity Connection14, 14SU1, 14SU2, 14SU3, 14SU3a, 15, 15SU1, 14SU4, 15SU2, 15SU3, 14SU5, 15SU4, 14SU6—

Why it's on these mode pages

  • Maritime: Vendor table: Cisco (network and remote-access gear used in every mode, all modes) (matched by rule)
  • Pipeline: Vendor table: Cisco (network and remote-access gear used in every mode, all modes) (matched by rule)
  • Freight rail: Vendor table: Cisco (network and remote-access gear used in every mode, all modes) (matched by rule)
  • Passenger rail and transit: Vendor table: Cisco (network and remote-access gear used in every mode, all modes) (matched by rule)
  • Highway and motor carrier: Vendor table: Cisco (network and remote-access gear used in every mode, all modes) (matched by rule)
  • Postal and parcel: Vendor table: Cisco (network and remote-access gear used in every mode, all modes) (matched by rule)

Change history

  1. November 9, 2026: First collected by Watch

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