PT-2025-20865 · Siemens · Simatic Pcs Neo

Published 2025-05-13 · Updated 2025-05-13 · CVE-2025-40566

Positive Technologies (AI Summary)

CVSS v2.0

10

Critical

Base vector

AV:N/AC:L/Au:N/C:C/I:C/A:C

Name of the Vulnerable Software and Affected Versions: SIMATIC PCS neo versions prior to V4.1 Update 3 SIMATIC PCS neo versions prior to V5.0 Update 1

Description: A vulnerability has been identified in SIMATIC PCS neo where 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.

Recommendations: For SIMATIC PCS neo versions prior to V4.1 Update 3, update to V4.1 Update 3 or later. For SIMATIC PCS neo versions prior to V5.0 Update 1, update to V5.0 Update 1 or later. As a temporary workaround, consider implementing additional session validation mechanisms to minimize the risk of session re-use.

Fix

Insufficient Session Expiration

Weakness Enumeration

CWE-613

Related Identifiers

BDU:2025-06604

CVE-2025-40566

Affected Products

Simatic Pcs Neo

References · 8

• https://nvd.nist.gov/vuln/detail/CVE-2025-40566 · Security Note
• https://bdu.fstec.ru/vul/2025-06604 · Security Note
• https://osv.dev/vulnerability/CVE-2025-40566 · Vendor Advisory
• https://cert-portal.siemens.com/productcert/html/ssa-339086.html · Vendor Advisory
• https://twitter.com/CVEnew/status/1922228930246799513 · Twitter Post
• https://twitter.com/VulmonFeeds/status/1922295790883496278 · Twitter Post
• https://t.me/cvetracker/23716 · Telegram Post
• https://twitter.com/CveFindCom/status/1922231417259376974 · Twitter Post