CVE-2025-40899: Nozomi Networks Cmc

High severity, CVSS 8.9. EPSS: 0.3% chance of exploitation in the next 30 days.

A Stored Cross-Site Scripting vulnerability was discovered in the Assets and Nodes functionality due to improper validation of an input parameter. An authenticated user with custom fields privileges can define a malicious custom field containing a JavaScript payload. When the victim views the Assets or Nodes pages, the XSS executes in their browser context, allowing the attacker to perform unauthorized actions as the victim, such as modify application data, disrupt application availability, and access limited sensitive information.

Affected products

• Nozomi Networks Cmc: before 26.0.0 (fixed in 26.0.0)
• Nozomi Networks Guardian: before 26.0.0 (fixed in 26.0.0)
• Siemens Ruggedcom APE1808: any version

Published 2026-04-15. Last modified 2026-06-17.