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CVE-2026-76473

CRITICAL CVSS 3.1: 9.8 EPSS 0.49%
Updated Oct 27, 2026
Cisco
Parameter Value
CVSS 9.8 (CRITICAL)
Type CWE-74 (Injection)
Vendor Cisco
Public PoC No

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-2026-76473 are related to issues concerning improper neutralization of special elements in output used by a downstream component that are grouped under the Common Weakness Enumeration (CWE) Class CWE-74.

Attack Parameters

Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed

Impact Assessment

Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service

CVSS Vector v3.1

Weakness Type (CWE)

CWE-74 Injection

Vulnerable Products

cisco:cisco emergency responder cisco:cisco unity connection cisco:cisco unified communications manager cisco:cisco unified communications manager im and presence service

References 1

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/c…
psirt@cisco.com
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