Vulnerability · Published Sep 9, 2025 · Assigned by siemens
CVE-2025-40795
Critical 9.8
In plain English
A critical-severity stack buffer overflow 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 0.7% (higher than 54% of all known vulnerabilities).
Official description
A vulnerability has been identified in SIMATIC PCS neo V4.1 (All versions), SIMATIC PCS neo V5.0 (All versions), SIMATIC PCS neo V6.0 (All versions < V6.0 SP1 Update 1), User Management Component (UMC) (All versions < V2.15.1.3). Affected products contain a stack-based buffer overflow vulnerability in the integrated UMC component. This could allow an unauthenticated remote attacker to execute arbitrary code or to cause a denial of service condition.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Siemens | SIMATIC PCS neo V4.1 | 0 – before * |
| Siemens | SIMATIC PCS neo V5.0 | 0 – before * |
| Siemens | SIMATIC PCS neo V6.0 | 0 – before V6.0 SP1 Update 1 |
| Siemens | User Management Component (UMC) | 0 – before V2.15.1.3 |
Weakness: CWE-121 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H