Cisco Unified Communications Products Security Hardening Release: October 2026

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. For a complete list of the advisories and links to them, see Cisco Advance Notification for Publication of October 21, 2026, Security Advisories ["https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-notice-QGwHnJ6k"].

CVE-2026-76475 — Cisco Unified Communications Products Hardening Release: October 2026 - Cross-site Scripting Vulnerabilities (CVSS 3.1 9.3, CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N) CVE-2026-76476 — Cisco Unified Communications Products Hardening Release: October 2026 - Improper Input Validation Vulnerabilities (CVSS 3.1 8.8, CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H) CVE-2026-76473 — Cisco Unified Communications Products Hardening Release: October 2026 - Improper control of a resource through its lifetime. (CVSS 3.1 9.8, CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H) CVE-2026-76477 — Cisco Unified Communications Products Hardening Release: October 2026 - Injection Vulnerabilities (CVSS 3.1 8.8, CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H) CVE-2026-76474 — Cisco Unified Communications Products Hardening Release: October 2026 - Improper Authentication Vulnerabilities (CVSS 3.1 9.8, CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H) CVE-2026-76478 — Cisco Unified Communications Products Hardening Release: October 2026 - Improper Access Control Vulnerabilities (CVSS 3.1 8.8, CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H) CVE-2026-76481 — Cisco Unified Communications Products Hardening Release: October 2026 - Improper Check or Handling of Exceptional Conditions Vulnerabilities (CVSS 3.1 7.5, CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H) CVE-2026-76479 — Cisco Unified Communications Products Hardening Release: October 2026 - Path Traversal Vulnerabilities (CVSS 3.1 7.8, CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)