Auth bypass in Siemens Sinec Nms

CVE-2026-25654

A vulnerability has been identified in SINEC NMS (All versions < V4.0 SP3). Affected products do not properly validate user authorization when processing password reset requests. This could allow an authenticated remote attacker to bypass authorization checks, leading to the ability to reset the password of any arbitrary user account.

Vulnerability class: IDOR (Insecure Direct Object Reference)

Published · last modified .

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.005 (43.6th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 44th percentile — 43.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-25654: held from 0.005 to 0.005.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: +0.001

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-25654?
CVE-2026-25654 is a high-severity vulnerability in Siemens Sinec Nms, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 8.8/10. Published 2026-04-14.
How severe is CVE-2026-25654?
High severity. CVSS v3 base score is 8.8 out of 10.