CVE-2026-76476 vulnerability in Cisco Products
Published on October 21, 2026
Cisco Unified Communications Products Hardening Release: October 2026 - Improper Input Validation Vulnerabilities
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.
Vulnerability Analysis
CVE-2026-76476 is exploitable with network access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to be very high.
Weakness Type
Improper Input Validation
The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.
Products Associated with CVE-2026-76476
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Affected Versions
Cisco Emergency Responder:- Version 14 is affected.
- Version 14SU1 is affected.
- Version 14SU2 is affected.
- Version 14SU3 is affected.
- Version 14SU3a is affected.
- Version 15 is affected.
- Version 15SU1 is affected.
- Version 15SU1a is affected.
- Version 14SU4 is affected.
- Version 15SU2 is affected.
- Version 15SU3 is affected.
- Version 14SU5 is affected.
- Version 15SU4 is affected.
- Version 14SU6 is affected.
- Version 14 is affected.
- Version 14SU1 is affected.
- Version 14SU2 is affected.
- Version 14SU3 is affected.
- Version 15 is affected.
- Version 15SU1 is affected.
- Version 14SU4 is affected.
- Version 14SU4a is affected.
- Version 15SU1a is affected.
- Version 15SU2 is affected.
- Version 15.0.1.13010-1 is affected.
- Version 15.0.1.13011-1 is affected.
- Version 15.0.1.13012-1 is affected.
- Version 15.0.1.13013-1 is affected.
- Version 15.0.1.13014-1 is affected.
- Version 15.0.1.13015-1 is affected.
- Version 15.0.1.13016-1 is affected.
- Version 15.0.1.13017-1 is affected.
- Version 15SU3a is affected.
- Version 14SU5 is affected.
- Version 15SU4 is affected.
- Version 15SU4a is affected.
- Version 14SU6 is affected.
- Version 14 is affected.
- Version 14SU1 is affected.
- Version 14SU2 is affected.
- Version 14SU2a is affected.
- Version 14SU3 is affected.
- Version 15 is affected.
- Version 15SU1 is affected.
- Version 14SU4 is affected.
- Version 15SU2 is affected.
- Version 15SU3 is affected.
- Version 14SU5 is affected.
- Version 15SU4 is affected.
- Version 14SU6 is affected.
- Version 14 is affected.
- Version 14SU1 is affected.
- Version 14SU2 is affected.
- Version 14SU3 is affected.
- Version 14SU3a is affected.
- Version 15 is affected.
- Version 15SU1 is affected.
- Version 14SU4 is affected.
- Version 15SU2 is affected.
- Version 15SU3 is affected.
- Version 14SU5 is affected.
- Version 15SU4 is affected.
- Version 14SU6 is affected.