# CVE-2025-40566

## Summary

- **CVE ID:** CVE-2025-40566
- **Severity:** HIGH
- **CVSS Score:** 8.8 (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N)
- **CWE:** CWE-613
- **Published:** May 13, 2025
- **Last Modified:** Mar 12, 2026

## Description

A vulnerability has been identified in SIMATIC PCS neo V4.1 (All versions < V4.1 Update 3), SIMATIC PCS neo V5.0 (All versions < V5.0 Update 1). Affected products do not correctly invalidate user sessions upon user logout. This could allow a remote unauthenticated attacker, who has obtained the session token by other means, to re-use a legitimate user's session even after logout.

## Affected Products

- Siemens — SIMATIC PCS neo V4.1 (0)
- Siemens — SIMATIC PCS neo V5.0 (0)

## References

- [CNA](https://cert-portal.siemens.com/productcert/html/ssa-339086.html)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.44%
- **EPSS Percentile:** 37.0

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._