CVE-2026-76476 — Cisco Unified Communications Products Hardening Release: October 2026 - Improper Input Validation Vulnerabilities

Description (CNA)

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.   The vulnerabilities tracked by CVE-2026-76476 are related to issues concerning improper input validation that are grouped under the Common Weakness Enumeration (CWE) Class CWE-20.

Affected (CNA)

Vendor / product	Versions
Cisco / Cisco Emergency Responder	affected 14; affected 14SU1; affected 14SU2; affected 14SU3; affected 14SU3a; affected 15; affected 15SU1; affected 15SU1a; affected 14SU4; affected 15SU2; affected 15SU3; affected 14SU5; affected 15SU4; affected 14SU6
Cisco / Cisco Unified Communications Manager	affected 14; affected 14SU1; affected 14SU2; affected 14SU3; affected 15; affected 15SU1; affected 14SU4; affected 14SU4a; affected 15SU1a; affected 15SU2; affected 15.0.1.13010-1; affected 15.0.1.13011-1; affected 15.0.1.13012-1; affected 15.0.1.13013-1; affected 15.0.1.13014-1; affected 15.0.1.13015-1; affected 15.0.1.13016-1; affected 15.0.1.13017-1; affected 15SU3a; affected 14SU5; affected 15SU4; affected 15SU4a; affected 14SU6
Cisco / Cisco Unified Communications Manager IM and Presence Service	affected 14; affected 14SU1; affected 14SU2; affected 14SU2a; affected 14SU3; affected 15; affected 15SU1; affected 14SU4; affected 15SU2; affected 15SU3; affected 14SU5; affected 15SU4; affected 14SU6
Cisco / Cisco Unity Connection	affected 14; affected 14SU1; affected 14SU2; affected 14SU3; affected 14SU3a; affected 15; affected 15SU1; affected 14SU4; affected 15SU2; affected 15SU3; affected 14SU5; affected 15SU4; affected 14SU6

CWE

CWE-20

References

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-voice-hardening-twgbH9e3

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.