CVE-2025-40566

HIGH

Siemens Simatic Pcs Neo < 4.1 - Insufficient Session Expiration

Title source: rule

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.

References (1)

[Vendor Advisory] https://cert-portal.siemens.com/productcert/html/ssa-339086.html

Scores

CVSS v3 8.8

EPSS 0.0021

EPSS Percentile 42.7%

Attack Vector NETWORK

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

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact total

Details

CWE

CWE-613

Status published

Products (4)

siemens/simatic_pcs_neo 4.1 update_1 (2 CPE variants)

siemens/simatic_pcs_neo 5.0

siemens/simatic_pcs_neo < 4.1

siemens/simatic_pcs_neo < 5.0

Published May 13, 2025

Tracked Since Feb 18, 2026