CVE-2026-25656
Improper Configuration File Modification in SINEC NMS Enables SYSTEM Code Execution
Publication date: 2026-02-10
Last updated on: 2026-04-14
Assigner: Siemens AG
Description
Description
CVSS Scores
EPSS Scores
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| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| siemens | sinec_nms | * |
| siemens | user_management_component | to 2.15.2.1 (exc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-427 | The product uses a fixed or controlled search path to find resources, but one or more locations in that path can be under the control of unintended actors. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
[{'type': 'paragraph', 'content': "The CVE-2026-25656 vulnerability affects Siemens' User Management Component (UMC) and SINEC NMS products. It is a local privilege escalation vulnerability that allows a low-privileged attacker to improperly modify a configuration file."}, {'type': 'paragraph', 'content': 'This improper modification enables the attacker to load malicious DLLs, which can lead to arbitrary code execution with SYSTEM-level privileges.'}, {'type': 'paragraph', 'content': 'The vulnerability is identified by CWE-427 (Uncontrolled Search Path Element) and has a high severity score according to CVSS v3.1 and v4.0.'}] [1]
How can this vulnerability impact me? :
This vulnerability can allow an attacker with low privileges to escalate their privileges to SYSTEM level by loading malicious DLLs through improper modification of a configuration file.
As a result, the attacker could execute arbitrary code with the highest system privileges, potentially compromising the entire affected system.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
How can this vulnerability be detected on my network or system? Can you suggest some commands?
I don't know
What immediate steps should I take to mitigate this vulnerability?
[{'type': 'paragraph', 'content': 'To mitigate the CVE-2026-25656 vulnerability, it is strongly recommended to update the User Management Component (UMC) to version 2.15.2.1 or later, as Siemens has released this version to address the issue.'}, {'type': 'paragraph', 'content': "Additionally, protect network access to affected devices and follow Siemens' operational guidelines for Industrial Security to reduce the risk of exploitation."}] [1]