Vulnerability · Published May 13, 2025 · Assigned by siemens
CVE-2025-40566
High 8.8
In plain English
A high-severity security flaw in SIMATIC PCS neo V4.1 from Siemens. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 40% of all known vulnerabilities).
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Siemens | SIMATIC PCS neo V4.1 | 0 – before V4.1 Update 3 |
| Siemens | SIMATIC PCS neo V5.0 | 0 – before V5.0 Update 1 |
Weakness: CWE-613 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H