# CVE-2026-25655: Privilege escalation in SINEC NMS

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

- **Severity:** High 8.5 (`CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 10 Feb 2026
- **Updated:** 10 Feb 2026
- **Also known as:** GHSA-53c9-5r42-637x

## 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 (Uncontrolled Search Path Element)

## Which versions are affected by CVE-2026-25655?

It affects 1 product.


Products: 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.

## Other vulnerabilities in Siemens SINEC NMS

- [CVE-2024-41940](https://insights.sbomify.com/CVE-2024-41940/): Command injection in SINEC NMS (critical 9.4)
- [CVE-2025-40736](https://insights.sbomify.com/CVE-2025-40736/): Missing authorization in SINEC NMS (critical 9.3)
- [CVE-2021-33724](https://insights.sbomify.com/CVE-2021-33724/): Path traversal in SINEC NMS (critical 9.1)
- [CVE-2021-33725](https://insights.sbomify.com/CVE-2021-33725/): Path traversal in SINEC NMS (critical 9.1)
- [CVE-2024-23810](https://insights.sbomify.com/CVE-2024-23810/): SQL injection in SINEC NMS (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-25655 and fix it if it is affected.

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

Affected product: Siemens SINEC NMS. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-25655/ (Markdown: https://insights.sbomify.com/CVE-2026-25655/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-25655
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-25655
- OSV: https://osv.dev/vulnerability/CVE-2026-25655

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-25655/
Summaries are generated and may contain mistakes; the official description above is the record.