# CVE-2021-37194: File upload in COMOS V10.2

> Attackers can upload malicious files to the Siemens COMOS web server if web components are enabled, potentially leading to code execution.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 9 Feb 2022
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-3pr9-fm6f-mq6g

## What is CVE-2021-37194?

CVE-2021-37194 is a high-severity vulnerability in Siemens COMOS V10.2, published on 9 Feb 2022. 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 COMOS V10.2 (All versions only if web components are used), COMOS V10.3 (All versions < V10.3.3.3 only if web components are used), COMOS V10.4 (All versions < V10.4.1 only if web components are used). The COMOS Web component of COMOS allows to upload and store arbitrary files at the webserver. This could allow an attacker to store malicious files.

Weakness: CWE-434 (Unrestricted Upload of File with Dangerous Type)

## Which versions are affected by CVE-2021-37194?

It affects 1 product.


Products: Siemens Comos.

## How do I fix CVE-2021-37194?

No fix has been published for CVE-2021-37194 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-37194 being exploited?

There is no known exploitation of CVE-2021-37194 in the wild and no public exploit code.

## Other vulnerabilities in Siemens COMOS V10.2

- [CVE-2023-24482](https://insights.sbomify.com/CVE-2023-24482/): Memory corruption in COMOS V10.2 (critical 10.0)
- [CVE-2023-43504](https://insights.sbomify.com/CVE-2023-43504/): Memory corruption in COMOS (critical 9.6)
- [CVE-2023-43505](https://insights.sbomify.com/CVE-2023-43505/): Missing authorization in COMOS (critical 9.6)
- [CVE-2023-46601](https://insights.sbomify.com/CVE-2023-46601/): Missing authorization in COMOS (critical 9.6)
- [CVE-2021-37197](https://insights.sbomify.com/CVE-2021-37197/): SQL injection in COMOS V10.2 (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-37194 and fix it if it is affected.

What it is: CVE-2021-37194 is a high-severity vulnerability in Siemens COMOS V10.2, published on 9 Feb 2022. 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-2021-37194 in the wild and no public exploit code.

Affected product: Siemens COMOS V10.2. 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-2021-37194/ (Markdown: https://insights.sbomify.com/CVE-2021-37194/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-37194
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-37194
- OSV: https://osv.dev/vulnerability/CVE-2021-37194

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-37194/
Summaries are generated and may contain mistakes; the official description above is the record.