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Advisory severityCritical9.8Cisco Exploited Updated

Critical [CVE-2026-76473 +7] Cisco Unified Communications Products Security Hardening Release: October 2026

This critical-severity Cisco advisory covers CVE-2026-76473 and CVE-2026-76474 and 6 more CVEs affecting Emergency Responder, Unified Communications Manager IM and Presence Service, Unity Connection.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations. This bulletin covers 8 CVEs; its score, affected versions and guidance may apply to different issues within that bulletin.

cisco-sa-voice-hardening-twgbH9e3 Source published Source updated

VulniPulse record published Record updated

CVE-2026-76473CVE-2026-76474CVE-2026-76475CVE-2026-76476CVE-2026-76477CVE-2026-76478CVE-2026-76479CVE-2026-76481
Affected products & platforms
CiscoUnified Communications
Open source advisory

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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.

These vulnerabilities were found during internal testing and are not known to be actively exploited.

To assist customers in patching and streamline the disclosure process, Cisco has grouped these issues by their underlying vulnerability class — Common Weakness Enumeration (CWE) — and assigned a single Common Vulnerabilities and Exposures identifier (CVE ID) to each CWE grouping.

Note: Cisco may publish separate security advisories that provide additional details about individual vulnerabilities that are addressed in this release.

Cisco has released software updates that address these vulnerabilities. There are no workarounds that address these vulnerabilities.

This advisory is part of a group of advisories.

Affected products named by the advisory: Unified Communications Manager IM and Presence Service.

Affected versions
  • Scope: These vulnerabilities affect the following Cisco products, regardless of device configuration:
  • 14 — Migrate to a fixed release
  • Release 15 (first fixed: 15SU5)

Official advisory · high-confidence parse· fetched 14 hours ago·verify at source

Fixed versions
  • 15SU5

Official advisory · high-confidence parse· fetched 14 hours ago·verify at source

Mitigation checklist

Recommended fix / mitigation
  • Upgrade to the first fixed release for your train per the Fixed Releases table in this advisory.
  • Release 14: migrate to a fixed release.
  • Release 15: upgrade to 15SU5.
Workaround status
  • There are no workarounds that address these vulnerabilities.

Official advisory · high-confidence parse· fetched 14 hours ago·verify at source

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