# CVE-2025-40830: Missing authorization in SINEC Security Monitor

> An authenticated low-privileged local attacker can read or write arbitrary files on the server or sensor due to missing authorization checks in the file transfer feature.

- **Severity:** High 8.4 (`CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 9 Dec 2025
- **Updated:** 9 Dec 2025
- **Also known as:** GHSA-35cr-f3qc-gm6j

## What is CVE-2025-40830?

CVE-2025-40830 is a high-severity missing authorization vulnerability in Siemens SINEC Security Monitor, published on 9 Dec 2025. 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 Security Monitor (All versions < V4.10.0). The affected application does not have proper authorization checks for the file_transfer feature in ssmctl-client command. This could allow an authenticated, lowly privileged local attacker to read or write to any file on server or sensor.

Weakness: CWE-285 (Improper Authorization)

## Which versions are affected by CVE-2025-40830?

It affects 1 product.


Products: Siemens Sinec Security Monitor.

## How do I fix CVE-2025-40830?

No fix has been published for CVE-2025-40830 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-40830 being exploited?

There is no known exploitation of CVE-2025-40830 in the wild and no public exploit code.

## Other vulnerabilities in Siemens SINEC Security Monitor

- [CVE-2024-47553](https://insights.sbomify.com/CVE-2024-47553/): Command injection in SINEC Security Monitor (critical 9.4)
- [CVE-2024-47562](https://insights.sbomify.com/CVE-2024-47562/): Command injection in SINEC Security Monitor (critical 9.3)
- [CVE-2025-40831](https://insights.sbomify.com/CVE-2025-40831/): Denial of service in SINEC Security Monitor (high 7.1)
- [CVE-2024-47563](https://insights.sbomify.com/CVE-2024-47563/): Path traversal in SINEC Security Monitor (medium 6.9)
- [CVE-2026-27661](https://insights.sbomify.com/CVE-2026-27661/): Information disclosure in SINEC Security Monitor (medium 5.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-40830 and fix it if it is affected.

What it is: CVE-2025-40830 is a high-severity missing authorization vulnerability in Siemens SINEC Security Monitor, published on 9 Dec 2025. 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-2025-40830 in the wild and no public exploit code.

Affected product: Siemens SINEC Security Monitor. 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-2025-40830/ (Markdown: https://insights.sbomify.com/CVE-2025-40830/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-40830
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-40830
- OSV: https://osv.dev/vulnerability/CVE-2025-40830

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-40830/
Summaries are generated and may contain mistakes; the official description above is the record.