Cisco Security Advisories guidance
Vendor revision: Nov 4, 2026To remediate the vulnerabilities that were disclosed on November 4, 2026, Cisco strongly recommends that customers upgrade to the fixed software that is indicated in the advisories.
Overview
What is CVE-2026-76419?
A vulnerability in the web-based management interface of Cisco Unified Communications Manager (Unified CM) and Cisco Unified Communications Manager Session Management Edition (Unified CM SME) could allow an unauthenticated, remote attacker to conduct a cross-site scripting (XSS) attack against a user of the interface.
This vulnerability exists because the web-based management interface does not properly validate user-supplied input. An attacker could exploit this vulnerability by persuading a user of the interface to click a crafted link.
A successful exploit could allow the attacker to execute arbitrary script code in the context of the affected interface or access sensitive, browser-based information.
Source: NVD
Official advisory
Configuration and update guidance
Cisco Security Advisories · Updated Nov 4, 2026
Affected products and configuration
At the time of publication, this vulnerability affected Cisco Unified CM and Cisco Unified CM SME, regardless of device configuration.
For information about which Cisco software releases were vulnerable at the time of publication, see the Fixed Software section of this advisory. See the Details section in the bug ID(s) at the top of this advisory for the most complete and current information.
Workarounds and temporary mitigations
There are no workarounds that address this vulnerability.
Fixed software
Cisco considers any workarounds and mitigations (if applicable) to be temporary solutions until an upgrade to a fixed software release is available. To remediate this vulnerability and avoid future exposure as described in this advisory, Cisco strongly recommends that customers upgrade to the fixed software indicated in this advisory.
Fixed Releases
At the time of publication, the release information in the following table was accurate. See the Details section in the bug ID(s) at the top of this advisory for the most complete and current information.
The left column lists Cisco software releases, and the right column indicates whether a release was affected by the vulnerability that is described in this advisory and which release included the fix for this vulnerability.
Cisco Unified CM and Unified CM SME Release | First Fixed Release |
|---|---|
14 | Migrate to a fixed release. |
15 | 15SU5 |
Note: This fix is also included as part of the broader hardening improvements that are disclosed in the security advisory Cisco Unified Communications Products Security Hardening Release: October 2026.
The Cisco Product Security Incident Response Team (PSIRT) validates only the affected and fixed release information that is documented in this advisory.
Exploitation status
The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerabilities that are described in this advisory.