# CVE-2021-33032: Command injection in n/a

> Remote unauthenticated attackers can execute system commands as root via HTTP requests in the HomeMatic CCU WebUI.

- **Severity:** Critical 10.0 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/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:** 22 Jul 2021
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-r7xr-9q5c-fh23

## What is CVE-2021-33032?

CVE-2021-33032 is a critical command injection vulnerability in n/a, published on 22 Jul 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A Remote Code Execution (RCE) vulnerability in the WebUI component of the eQ-3 HomeMatic CCU2 firmware up to and including version 2.57.5 and CCU3 firmware up to and including version 3.57.5 allows remote unauthenticated attackers to execute system commands as root via a simple HTTP request.

Weakness: CWE-78 (Improper Neutralization of Special Elements used in an OS Command)

## Which versions are affected by CVE-2021-33032?

It affects 2 products.


Products: Eq-3 Homematic Ccu2 Firmware, Eq-3 Homematic Ccu3 Firmware.

## How do I fix CVE-2021-33032?

No fix has been published for CVE-2021-33032 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-33032 being exploited?

There is no known exploitation of CVE-2021-33032 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2019-18937](https://insights.sbomify.com/CVE-2019-18937/): Command injection in n/a (critical 9.8)
- [CVE-2019-18938](https://insights.sbomify.com/CVE-2019-18938/): Code injection in n/a (critical 9.8)
- [CVE-2019-18939](https://insights.sbomify.com/CVE-2019-18939/): Command injection in n/a (critical 9.8)
- [CVE-2019-16199](https://insights.sbomify.com/CVE-2019-16199/): Auth bypass in n/a (critical 9.8)
- [CVE-2019-9584](https://insights.sbomify.com/CVE-2019-9584/): Missing authorization in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-33032 and fix it if it is affected.

What it is: CVE-2021-33032 is a critical command injection vulnerability in n/a, published on 22 Jul 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-2021-33032 in the wild and no public exploit code.

Affected product: n/a. 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-2021-33032/ (Markdown: https://insights.sbomify.com/CVE-2021-33032/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-33032
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-33032
- OSV: https://osv.dev/vulnerability/CVE-2021-33032

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-33032/
Summaries are generated and may contain mistakes; the official description above is the record.