Republished vendor advisory. This ICSA is a verbatim republication of Siemens ProductCERT SSA-339086 from a direct conversion of their vendor's Common Security Advisory Framework (CSAF) advisory. This is republished to CISA's website as a means of increasing visibility and is provided "as-is" for informational purposes only. CISA is not responsible for the editorial or technical accuracy of republished advisories and provides no warranties of any kind regarding any information contained within this advisory. Further, CISA…
General Recommendations: As a general security measure, Siemens strongly recommends to protect network access to devices with appropriate mechanisms. In order to operate the devices in a protected IT environment, Siemens recommends to configure the environment according to Siemens' operational guidelines for Industrial Security (Download: https://www.siemens.com/cert/operational-guidelines-industrial-security), and to follow the recommendations in the product manuals. Additional information on Industrial Security by Siemens can be found at: https://www.siemens.com/industrialsecurity
Additional Resources: For further inquiries on security vulnerabilities in Siemens products and solutions, please contact the Siemens ProductCERT: https://www.siemens.com/cert/advisories
Credit: Siemens ProductCERT
From CISA's machine-readable CSAF 2.0 advisory (JSON).
| CVE | Weakness | CVSS v3 | Details |
|---|---|---|---|
| CVE-2025-40566 | CWE-613 Insufficient Session Expiration | 8.8 High |
CVE-2025-40566 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. Vendor fix: Update to V4.1 Update 3 or later version ↗ Vendor fix: Update to V5.0 Update 1 or later version ↗ Affected, fixed & timelineAffected:
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Scores and weakness types are as CISA or the republishing vendor stated them in this advisory; the linked CVE pages carry the independently enriched CVSS and SSVC assessments.
No coverage found in monitored research blogs or news feeds.
| CVE | CVSS | Affected |
|---|---|---|
| CVE-2025-40566 | 8.8 High | Siemens SIMATIC PCS neo V4.1 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). Affe… |
Named by the advisory itself. Each CVE links to its tracked detail page.
Each vendor links to its Known Exploited Vulnerabilities catalog page. Only vendors that appear in the KEV catalog are listed, either because the publication cites one of their KEV entries or because it names them directly.