CVE-2026-25656: Siemens SINEC NMS · Uncontrolled Search Path Element
Affects Siemens SINEC NMSSource CVE Database V5
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
- 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:HExploitation evidence
Disclosed: evidence found.
CVE published 10 Feb 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by 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
| Product | Affected | Fixed in |
|---|---|---|
| SiemensSINEC NMS | Affected
| Fixed in– |
| SiemensUser Management Component (UMC) | Affected
| Fixed in
|
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.