What is CVE-2025-40736?

CVE-2025-40736 is a critical-severity vulnerability in Siemens Sinec Nms, classified under Missing Authentication for Critical Function. CVSS score: 9.8/10. Published 2025-07-08.

How severe is CVE-2025-40736?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Auth bypass in Siemens Sinec Nms

CVE-2025-40736

A vulnerability has been identified in SINEC NMS (All versions < V4.0). The affected application exposes an endpoint that allows an unauthorized modification of administrative credentials. This could allow an unauthenticated attacker to re…

Vulnerability class: Broken Authentication

EPSS: 0.005 (65.4th percentile) — read the EPSS interpretation.

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.

Affected products

Siemens Sinec Nms — versions 0

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

References

cert-portal.siemens.com/productcert/html/ssa-078892.html

Frequently asked questions

What is CVE-2025-40736?: CVE-2025-40736 is a critical-severity vulnerability in Siemens Sinec Nms, classified under Missing Authentication for Critical Function. CVSS score: 9.8/10. Published 2025-07-08.
How severe is CVE-2025-40736?: Critical severity. CVSS v3 base score is 9.8 out of 10.