Resource exhaustion in Siemens Simatic Et 200al Im 157-1 Pn
CVE-2025-40944
A vulnerability has been identified in SIMATIC ET 200AL IM 157-1 PN (6ES7157-1AB00-0AB0) (All versions), SIMATIC ET 200MP IM 155-5 PN HF (6ES7155-5AA00-0AC0) (All versions >= V4.2.0), SIMATIC ET 200SP IM 155-6 MF HF (6ES7155-6MU00-0CN0) (A…
Vulnerability class: DoS (Denial of Service)
EPSS: 0.000 (6.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Siemens Simatic Et 200al Im 157-1 Pn — versions 0
- Siemens Simatic Et 200mp Im 155-5 Pn Hf — versions V4.2.0
- Siemens Simatic Et 200sp Im 155-6 Mf Hf — versions 0
- Siemens Simatic Et 200sp Im 155-6 Pn/2 Hf — versions V4.2.0
- Siemens Simatic Et 200sp Im 155-6 Pn/3 Hf — versions 0
- Siemens Simatic Et 200sp Im 155-6 Pn Ha (Incl. Siplus Variants) — versions 0
- Siemens Simatic Et 200sp Im 155-6 Pn R1 — versions 0
- Siemens Simatic Pn/mf Coupler — versions 0
- Siemens Simatic Pn/pn Coupler — versions 0
- Siemens Siplus Et 200mp Im 155-5 Pn Hf — versions V4.2.0
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2025-40944?
- CVE-2025-40944 is a high-severity vulnerability in Siemens Simatic Et 200al Im 157-1 Pn, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2026-01-13.
- How severe is CVE-2025-40944?
- High severity. CVSS v3 base score is 7.5 out of 10.