CVE-2025-40566CRITICAL 9.8EPSS p29.1%

CVE-2025-40566CVE-2025-40566

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.

Scoring

CVSS 3.19.8 (CRITICAL)
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS0.37% probability of exploitation · percentile 29.1% · 2026-06-18T12:00:27Z
Published2025-05-13
Last modified2025-08-22

Underlying weaknesses· 1

CWE-613

References

  1. https://cert-portal.siemens.com/productcert/html/ssa-339086.html

1

TypeTargetConfidenceTier
WeaknessInsufficient Session Expirationcwe-6130%live

Related by meaning· 6

Nearest entities by semantic similarity across the cs-graph corpus.

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Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.