Stored cross-site scripting in Cisco IOS XE - CVE-2026-20112
Published: March 25, 2026
Vulnerability identifier: #VU124593
CSH Severity: Low
CVSS v4: 4.8 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N]
CVE-ID: CVE-2026-20112
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to execute arbitrary script code in the context of the affected interface or access sensitive, browser-based information.
The vulnerability exists due to improper input validation in the web-based Cisco IOx application hosting environment management interface when processing user-supplied input. A remote user can inject malicious code into specific pages of the interface 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 and user interaction is required.
Affected software
Cisco IOS XE
How to mitigate CVE-2026-20112
Install security update from vendor's website.
Cisco IOS XE - addressed in versions 17.15.5, 17.18.2