CVE-2026-76474 Cisco Unified Communications - Authentication Bypass

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 authentication vulnerabilities caused by flawed authentication mechanisms, letting attackers bypass authentication, exploit requires unspecified conditions.

CVSS base score 9.8 /10
Critical
CISA KEV
Not listed
Public exploit
None known
View the NVD record ↗

Details

Type
Authentication Bypass
Impact
Broken Authentication
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
21 October 2026
Updated
22 October 2026
Weakness
CWE-287

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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