# CVE-2021-33724: Path traversal in SINEC NMS

> An attacker can delete arbitrary files or directories in Siemens SINEC NMS via path traversal, potentially disrupting system operations.

- **Severity:** Critical 9.1 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 12 Oct 2021
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-jcg2-3p6x-f868

## What is CVE-2021-33724?

CVE-2021-33724 is a critical path traversal vulnerability in Siemens SINEC NMS, published on 12 Oct 2021. 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 < V1.0 SP2 Update 1). The affected system contains an Arbitrary File Deletion vulnerability that possibly allows to delete an arbitrary file or directory under a user controlled path.

Weakness: CWE-22 (Improper Limitation of a Pathname to a Restricted Directory)

## Which versions are affected by CVE-2021-33724?

It affects 1 product.


Products: Siemens Sinec Nms.

## How do I fix CVE-2021-33724?

No fix has been published for CVE-2021-33724 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-33724 being exploited?

There is no known exploitation of CVE-2021-33724 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-2021-33725](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-2021-33724 and fix it if it is affected.

What it is: CVE-2021-33724 is a critical path traversal vulnerability in Siemens SINEC NMS, published on 12 Oct 2021. 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-2021-33724 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-2021-33724/ (Markdown: https://insights.sbomify.com/CVE-2021-33724/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-33724
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-33724
- OSV: https://osv.dev/vulnerability/CVE-2021-33724

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-33724/
Summaries are generated and may contain mistakes; the official description above is the record.