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CVE-2025-40566: 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)....

8.8 CVSS

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.

Classification

CVE ID: CVE-2025-40566

CVSS Base Severity: HIGH

CVSS Base Score: 8.8

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Problem Types

CWE-613: Insufficient Session Expiration

Affected Products

Vendor: Siemens

Product: SIMATIC PCS neo V4.1, SIMATIC PCS neo V5.0

Exploit Prediction Scoring System (EPSS)

EPSS Score: 0.08% (probability of being exploited)

EPSS Percentile: 25.58% (scored less or equal to compared to others)

EPSS Date: 2025-06-11 (when was this score calculated)

References

https://nvd.nist.gov/vuln/detail/CVE-2025-40566
https://cert-portal.siemens.com/productcert/html/ssa-339086.html

Timeline