Critical severity · published Oct 21, 2026
CVE-2026-76475
Cisco Unified Communications Products Hardening Release: October 2026 - Cross-site Scripting Vulnerabilities
New
9.3
CVSS
0.3%
EPSS
No
On KEV
Description
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-2026-76475 are related to issues concerning improper neutralization of input during web page generation that are grouped under the Common Weakness Enumeration (CWE) Base CWE-79.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 26% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CE
Cisco Emergency Responder · Cisco
14; 14SU1; 14SU2; 14SU3; 14SU3a; 15; +8 more · source: vendor
CU
Cisco Unified Communications Manager · Cisco
14; 14SU1; 14SU2; 14SU3; 15; 15SU1; +17 more · source: vendor
CU
Cisco Unified Communications Manager IM and Presence Service · Cisco
14; 14SU1; 14SU2; 14SU2a; 14SU3; 15; +7 more · source: vendor
CU
Cisco Unity Connection · Cisco
14; 14SU1; 14SU2; 14SU3; 14SU3a; 15; +7 more · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-76475
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-76475
sec.cloudapps.cisco.com
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-voice-hardening-twgbH9e3
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