What is CVE-2025-40937?

CVE-2025-40937 is a high-severity vulnerability in Siemens Simatic Cn 4100, classified under Command Injection. CVSS score: 8.3/10. Published 2025-12-09.

How severe is CVE-2025-40937?

High severity. CVSS v3 base score is 8.3 out of 10.

RCE in Siemens Simatic Cn 4100

CVE-2025-40937

A vulnerability has been identified in SIMATIC CN 4100 (All versions < V4.0.1). The affected application do not properly validate input parameters in its REST API, resulting in improper handling of unexpected arguments. This could allow an authenticated attacker to execute arbitrary code with limited privileges.

Vulnerability class: Command Injection (OS Command Injection)

EPSS: 0.006 (45.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L.

Affected products

Weakness classification (CWE)

CWE-77 — Command Injection

References

productcert@siemens.com (Vendor Advisory)

Frequently asked questions

What is CVE-2025-40937?: CVE-2025-40937 is a high-severity vulnerability in Siemens Simatic Cn 4100, classified under Command Injection. CVSS score: 8.3/10. Published 2025-12-09.
How severe is CVE-2025-40937?: High severity. CVSS v3 base score is 8.3 out of 10.