CVE-2026-20112: Cisco IOS XE Software

Medium severity, CVSS 4.8. EPSS: 0.2% chance of exploitation in the next 30 days.

A vulnerability in the web-based Cisco IOx application hosting environment management interface of Cisco IOS XE Software could allow an authenticated, remote attacker to conduct a stored cross-site scripting (XSS) attack against a user of the web-based management interface of an affected device. This vulnerability is due to insufficient validation of user-supplied input. 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 Cisco IOS XE Software: version 16.6.1 only; version 16.6.2 only; version 16.6.3 only; version 16.6.4 only; version 16.6.5 only; version 16.6.4a only; …

Published 2026-03-25. Last modified 2026-06-17.