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VulnerabilityPublished Updated

CVE-2026-25656: Siemens SINEC NMS · Uncontrolled Search Path Element

Affects Siemens SINEC NMSSource CVE Database V5

0

Not known to be exploited · CVSS 7.8 High : upgrade to 2.15.2.1 soon.

Data as of 26 Oct 2026, 10:12 UTC

CVSS 3.1 base score
7.8High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.2% chance of exploitation in 30 days – higher than 18% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 2.15.2.1
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 10 Feb 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

Upgrade User Management Component (UMC) to 2.15.2.1.

Affected software

ProductAffectedFixed in
SiemensSINEC NMSAffected
  • =0
Fixed in–
SiemensUser Management Component (UMC)Affected
  • <2.15.2.1
Fixed in
  • 2.15.2.1

AI-suggested

If you cannot patch yet, restrict low-privileged user access to configuration files and monitor for unauthorized modifications. Avoid running the affected software versions in high-risk environments where untrusted users have access.

Description

CVE-2026-25656 is a high-severity vulnerability in Siemens SINEC NMS and its User Management Component (UMC) affecting versions prior to V4.0 SP3 and V2.15.2.1 respectively. It allows a low-privileged user to improperly modify a configuration file, which can lead to loading malicious DLLs. Successful exploitation could result in arbitrary code execution with SYSTEM privileges. The vulnerability is classified under CWE-427 (Uncontrolled Search Path Element). There are no known exploits in the wild at this time.

References

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