CVE-2026-76475: Cisco Unified Communications Products cross-site scripting in web interface

CVE-2026-76475 · Severity: critical · CVSS 9.3 · Published 2026-10-21

Cisco's unified communications platform—used by organizations for voice, video, and messaging—contains multiple critical web application vulnerabilities including cross-site scripting, authentication bypass, and SQL injection. An unauthenticated attacker on the network can exploit these flaws to gain administrative access, steal data, or disrupt communications services without any user interaction required.

Technologies: Cisco Emergency Responder, Cisco Prime Collaboration Deployment, Cisco Unified Communications Manager, Cisco Unified Communications Manager IM & Presence Service, Cisco Unified Communications Manager Session Management Edition, Cisco Unity Connection. Vendors: Cisco.

Quick answers

Is CVE-2026-76475 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-76475 being exploited in the wild.
How severe is CVE-2026-76475?
Critical severity, with a CVSS score of 9.3, published 21 October 2026.
Which products and versions are affected?
Cisco Unity Connection Release 14 and earlier.
Is there a fix for CVE-2026-76475?
Yes: fixed in Release 15SU5 and later; Release 14 requires migration. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-76475 attacked?
It is attacked over the network, in a hosted service.
Am I affected by CVE-2026-76475?
Check whether you run Cisco Emergency Responder, Cisco Prime Collaboration Deployment, Cisco Unified Communications Manager or one of the others listed at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • Fixed in: Release 15SU5 and later; Release 14 requires migration

Technical details

CVE-2026-76475 is a cross-site scripting (CWE-79) flaw in web page generation across Emergency Responder, Prime Collaboration Deployment, Unified CM, Unified CM IM&P, Unified CM SME, and Unity Connection. Attack vector is network-based with no authentication or user interaction required; the advisory groups multiple vulnerability classes (input validation, authentication bypass, SQL injection, path traversal) under separate CVE IDs with CVSS scores ranging from 7.5 to 9.8. Fixes are available in Unified CM release 15SU5 and later; release 14 requires migration.

Affected products

  • Cisco Emergency Responder
  • Cisco Prime Collaboration Deployment
  • Cisco Unified Communications Manager
  • Cisco Unified Communications Manager IM & Presence Service
  • Cisco Unified Communications Manager Session Management Edition
  • Cisco Unity Connection Release 14 and earlier

Timeline

  • 2026-10-21: disclosed

References

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