CVE-2026-76476

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.

CVSS v3 8.8 HIGH

8.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

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

Configurations

No configuration.

History

21 Oct 2026, 17:19

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-21 17:19

Updated : 2026-10-22 23:19

NVD link : CVE-2026-76476

Mitre link : CVE-2026-76476

CVE.ORG link : CVE-2026-76476

JSON object : View

Products Affected

No product.

CWE

CWE-20

Improper Input Validation

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{"status": "affected", "version": "14SU1"}, {"status": "affected", "version": "14SU2"}, {"status": "affected", "version": "14SU3"}, {"status": "affected", "version": "14SU3a"}, {"status": "affected", "version": "15"}, {"status": "affected", "version": "15SU1"}, {"status": "affected", "version": "15SU1a"}, {"status": "affected", "version": "14SU4"}, {"status": "affected", "version": "15SU2"}, {"status": "affected", "version": "15SU3"}, {"status": "affected", "version": "14SU5"}, {"status": "affected", "version": "15SU4"}, {"status": "affected", "version": "14SU6"}], "defaultStatus": "unknown"}, {"vendor": "Cisco", "product": "Cisco Unified Communications Manager", "versions": [{"status": "affected", "version": "14"}, {"status": "affected", "version": "14SU1"}, {"status": "affected", "version": "14SU2"}, {"status": "affected", "version": "14SU3"}, {"status": "affected", "version": "15"}, {"status": "affected", "version": "15SU1"}, {"status": "affected", "version": "14SU4"}, {"status": "affected", "version": "14SU4a"}, {"status": "affected", "version": "15SU1a"}, {"status": "affected", "version": "15SU2"}, {"status": "affected", "version": "15.0.1.13010-1"}, {"status": "affected", "version": "15.0.1.13011-1"}, {"status": "affected", "version": "15.0.1.13012-1"}, {"status": "affected", "version": "15.0.1.13013-1"}, {"status": "affected", "version": "15.0.1.13014-1"}, {"status": "affected", "version": "15.0.1.13015-1"}, {"status": "affected", "version": "15.0.1.13016-1"}, {"status": "affected", "version": "15.0.1.13017-1"}, {"status": "affected", "version": "15SU3a"}, {"status": "affected", "version": "14SU5"}, {"status": "affected", "version": "15SU4"}, {"status": "affected", "version": "15SU4a"}, {"status": "affected", "version": "14SU6"}], "defaultStatus": "unknown"}, {"vendor": "Cisco", "product": "Cisco Unified Communications Manager IM and Presence Service", "versions": [{"status": "affected", "version": "14"}, {"status": "affected", "version": "14SU1"}, {"status": "affected", "version": "14SU2"}, {"status": "affected", "version": "14SU2a"}, {"status": "affected", "version": "14SU3"}, {"status": "affected", "version": "15"}, {"status": "affected", "version": "15SU1"}, {"status": "affected", "version": "14SU4"}, {"status": "affected", "version": "15SU2"}, {"status": "affected", "version": "15SU3"}, {"status": "affected", "version": "14SU5"}, {"status": "affected", "version": "15SU4"}, {"status": "affected", "version": "14SU6"}], "defaultStatus": "unknown"}, {"vendor": "Cisco", "product": "Cisco Unity Connection", "versions": [{"status": "affected", "version": "14"}, {"status": "affected", "version": "14SU1"}, {"status": "affected", "version": "14SU2"}, {"status": "affected", "version": "14SU3"}, {"status": "affected", "version": "14SU3a"}, {"status": "affected", "version": "15"}, {"status": "affected", "version": "15SU1"}, {"status": "affected", "version": "14SU4"}, {"status": "affected", "version": "15SU2"}, {"status": "affected", "version": "15SU3"}, {"status": "affected", "version": "14SU5"}, {"status": "affected", "version": "15SU4"}, {"status": "affected", "version": "14SU6"}], "defaultStatus": "unknown"}]}], "published": "2026-10-21T17:19:07.387", "references": [{"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-voice-hardening-twgbH9e3", "source": "psirt@cisco.com"}], "vulnStatus": "Awaiting Analysis", "weaknesses": [{"type": "Secondary", "source": "psirt@cisco.com", "description": [{"lang": "en", "value": "CWE-20"}]}], "descriptions": [{"lang": "en", "value": "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.  \r\n\r\nThe 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."}], "lastModified": "2026-10-22T23:19:07.803", "sourceIdentifier": "psirt@cisco.com"}