CVE-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.

Category

8.7
CVSS
Severity: High
CVSS 4.0 •
CVSS 3.1 •
EPSS 0.08%
Affected: Siemens SIMATIC PCS neo V4.1
Affected: Siemens SIMATIC PCS neo V5.0
Published at:
Updated at:

References

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

Frequently Asked Questions

What is the severity of CVE-2025-40566?
CVE-2025-40566 has been scored as a high severity vulnerability.
How to fix CVE-2025-40566?
To fix CVE-2025-40566, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-40566 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2025-40566 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-40566?
CVE-2025-40566 affects Siemens SIMATIC PCS neo V4.1, Siemens SIMATIC PCS neo V5.0.
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