High severity · published Feb 10, 2026
CVE-2026-25656
A vulnerability has been identified in SINEC NMS (All versions < V4.0 SP3), User Management Component (UMC) (All versions < V2.15.2.1)
7.8
CVSS
0.3%
EPSS
No
On KEV
Description
A vulnerability has been identified in SINEC NMS (All versions < V4.0 SP3), User Management Component (UMC) (All versions < V2.15.2.1). The affected application permits improper modification of a configuration file by a low-privileged user.
This could allow an attacker to load malicious DLLs, potentially leading to arbitrary code execution with SYSTEM privileges.(ZDI-CAN-28108)
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 19% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SN
Sinec Nms · Siemens
All versions, or not specified · source: NVD
UM
User Management Component · Siemens
before 2.15.2.1 · source: NVD
In the news
VulnerabilityHigh
ZDI-26-132: Siemens SINEC NMS Uncontrolled Search Path Element Local Privilege Escalation Vulnerability
This vulnerability allows local attackers to escalate privileges on affected installations of Siemens SINEC NMS. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The ZDI has assigned a CVSS rating of 7.8. The following CVEs are assigned: CVE-2026-25656.
Feb 25, 2026·Zero Day Initiative
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-25656
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-25656
Vendor Advisory
https://cert-portal.siemens.com/productcert/html/ssa-311973.html
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