A vulnerability has been identified in SINEC NMS (All versions < V4.0).

published 2025-07-08 16 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-20433

cvss: 9.8; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.5%; EPSS 0.5% chance of exploitation in 30 days, percentile 39%
public exploits: 0; none known

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 reset the superadmin password and gain full control of the application (ZDI-CAN-26569).

Patch / fix

fixed in 1

Siemens SINEC NMS V4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-25-191-01 updated 2025-07-08 cvss 9.8

Siemens SINEC NMS

Siemens SINEC NMS < V4.0
affected: fixed in V4.0 support.industry.siemens.com

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

CISA SSVC

Exploitation: none
Automatable: yes
Technical impact: total
Assessed: 16 mo ago (2025-07-08)

Exploit prediction

0.46% chance of exploitation in the next 30 days, higher than 39% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA	4.0	9.3	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CNA	4.0	9.3	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Affected products

Siemens SINEC NMS

Classification

Weakness

CWE-306 Missing Authentication for Critical Functionality

References

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

Sources

CVE List CVE-2025-40736
NVD CVE-2025-40736

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Summary