CVE-2026-76478 Cisco Unified Communications - Broken Access Control

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, and Cisco Unity Connection contain improper access control vulnerabilities caused by insufficient authorization checks, letting attackers gain unauthorized access, exploit requires internal conditions.

CVSS base score 8.8 /10
High
CISA KEV
Not listed
Public exploit
None known
View the NVD record ↗

Details

Type
Broken Access Control
Impact
Broken Access Control
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Published
21 October 2026
Updated
22 October 2026
Weakness
CWE-284

Vendor fix

Update to the latest software hardening releases provided by Cisco.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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