CVE-2025-20342: Cisco Unified Computing System E-Series Software Ucse

Medium severity, CVSS 5.4. EPSS: 0.2% chance of exploitation in the next 30 days.

A vulnerability in the Virtual Keyboard Video Monitor (vKVM) connection handling of Cisco Integrated Management Controller (IMC) could allow an authenticated, remote attacker with low privileges 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 a specific data field in 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 user credentials with privileges that allow for vKVM access on the affected device. Note: The affected vKVM client is also included in Cisco UCS Manager.

Affected products

• Cisco Cisco Unified Computing System E-Series Software Ucse: version 3.2.7 only; version 3.2.6 only; version 3.2.4 only; version 3.2.10 only; version 3.2.2 only; version 3.2.3 only; …
• Cisco Cisco Unified Computing System Managed: version 4.0(1a) only; version 3.2(3n) only; version 4.1(1a) only; version 4.1(1b) only; version 4.0(4h) only; version 4.1(1c) only; …
• Cisco Cisco Unified Computing System Standalone: version 2.0(1a) only; version 4.0(2g) only; version 2.0(13f) only; version 3.0(4n) only; version 2.0(3e)1 only; version 3.0(3e) only; …

Published 2025-08-27. Last modified 2026-06-17.