Buffer overflow in Siemens Simatic Pcs Neo
CVE-2025-40795
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.007 (53.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 53rd percentile — 53.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: +0.000
Affected products
- Siemens Simatic Pcs Neo — versions 4.1, 5.0
- Siemens Simatic Pcs Neo V4.1 — versions 0
- Siemens Simatic Pcs Neo V5.0 — versions 0
- Siemens Simatic Pcs Neo V6.0 — versions 0
- Siemens User Management Component
- Siemens User Management Component (Umc) — versions 0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cert-portal.siemens.com/productcert/html/ssa-722410.html (Vendor Advisory)
Frequently asked questions
- What is CVE-2025-40795?
- CVE-2025-40795 is a critical-severity vulnerability in Siemens Simatic Pcs Neo, classified under Stack-based Buffer Overflow. CVSS score: 9.8/10. Published 2025-09-09.
- How severe is CVE-2025-40795?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2025-40795 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.