CVE-2026-25655 Privilege escalation in SINEC NMS

Q: Is CVE-2026-25655 being exploited?

There is no known exploitation of CVE-2026-25655 in the wild and no public exploit code.

Q: How do I fix CVE-2026-25655?

No fix has been published for CVE-2026-25655 yet. Limit exposure of the affected software until one is available.

High 8.5 Published 10 Feb 2026 Updated 10 Feb 2026

A low-privileged user can modify configuration files to load malicious DLLs, achieving arbitrary code execution with administrative privileges.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-25655?

CVE-2026-25655 is a high-severity vulnerability in Siemens SINEC NMS, published on 10 Feb 2026. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A vulnerability has been identified in SINEC NMS (All versions < V4.0 SP2). 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 administrative privilege.(ZDI-CAN-28107)

Weakness: CWE-427

Which versions are affected by CVE-2026-25655?

It affects 1 product.

Products include Siemens Sinec Nms.

How do I fix CVE-2026-25655?

No fix has been published for CVE-2026-25655 yet. Limit exposure of the affected software until one is available.

Is CVE-2026-25655 being exploited?

There is no known exploitation of CVE-2026-25655 in the wild and no public exploit code.

Sources

Also known as GHSA-53c9-5r42-637x.