CVE-2026-20076: Cisco Identity Services Engine

Medium severity, CVSS 4.8. EPSS: 0.3% chance of exploitation in the next 30 days.

A vulnerability in the web-based management interface of Cisco Identity Services Engine (ISE) could allow an authenticated, remote attacker to conduct a stored cross-site scripting (XSS) attack against a user of the interface. This vulnerability is due to insufficient validation of user-supplied input by the web-based management interface of an affected system. An attacker could exploit this vulnerability by injecting malicious code into specific pages of the interface. 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. To exploit this vulnerability, the attacker must have valid administrative credentials.

Affected products

• Cisco Identity Services Engine: up to and including 3.1.0; version 3.2 only; version 3.2.0 only; version 3.3.0 only; version 3.4.0 only

Published 2026-01-15. Last modified 2026-06-17.