# CVE-2025-40899

## Summary

- **CVE ID:** CVE-2025-40899
- **Severity:** HIGH
- **CVSS Score:** 8.9 (CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:H/VA:H/SC:L/SI:L/SA:L)
- **CWE:** CWE-79
- **Published:** Apr 15, 2026
- **Last Modified:** Aug 11, 2026

## Description

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 — Guardian (0)
- Nozomi Networks — CMC (0)

## References

- [CNA](https://security.nozominetworks.com/NN-2026:2-01)
- [siemens-SADP](https://cert-portal.siemens.com/productcert/html/ssa-827968.html)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.29%
- **EPSS Percentile:** 21.4

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-18._