# CVE-2025-40736: Missing authorization in SINEC NMS

> An unauthenticated attacker can reset the superadmin password via an exposed endpoint, gaining full control of the SINEC NMS application.

- **Severity:** Critical 9.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 8 Jul 2025
- **Updated:** 8 Jul 2025
- **Also known as:** GHSA-5w39-m9v9-2j2j

## What is CVE-2025-40736?

CVE-2025-40736 is a critical missing authorization vulnerability in Siemens SINEC NMS, published on 8 Jul 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A vulnerability has been identified in SINEC NMS (All versions < V4.0). The affected application exposes an endpoint that allows an unauthorized modification of administrative credentials. This could allow an unauthenticated attacker to reset the superadmin password and gain full control of the application (ZDI-CAN-26569).

Weakness: CWE-306 (Missing Authentication for Critical Functionality)

## Which versions are affected by CVE-2025-40736?

It affects 1 product.


Products: Siemens Sinec Nms.

## How do I fix CVE-2025-40736?

No fix has been published for CVE-2025-40736 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-40736 being exploited?

There is no known exploitation of CVE-2025-40736 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-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)
- [CVE-2024-23811](https://insights.sbomify.com/CVE-2024-23811/): File upload in SINEC NMS (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-40736 and fix it if it is affected.

What it is: CVE-2025-40736 is a critical missing authorization vulnerability in Siemens SINEC NMS, published on 8 Jul 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2025-40736 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-2025-40736/ (Markdown: https://insights.sbomify.com/CVE-2025-40736/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-40736
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-40736
- OSV: https://osv.dev/vulnerability/CVE-2025-40736

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-40736/
Summaries are generated and may contain mistakes; the official description above is the record.