# CVE-2020-21935: Command injection in n/a

> Attackers can execute arbitrary code on Motorola CX2 routers via command injection in the HNAP1 interface.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/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:** 21 Jul 2021
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-gjqw-42c8-8w8j

## What is CVE-2020-21935?

CVE-2020-21935 is a critical command injection vulnerability in n/a, published on 21 Jul 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A command injection vulnerability in HNAP1/GetNetworkTomographySettings of Motorola CX2 router CX 1.0.2 Build 20190508 Rel.97360n allows attackers to execute arbitrary code.

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

## Which versions are affected by CVE-2020-21935?

It affects 1 product.


Products: Motorola Cx2 Firmware.

## How do I fix CVE-2020-21935?

No fix has been published for CVE-2020-21935 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-21935 being exploited?

There is no known exploitation of CVE-2020-21935 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2020-21937](https://insights.sbomify.com/CVE-2020-21937/): Command injection in n/a (critical 9.8)
- [CVE-2019-12297](https://insights.sbomify.com/CVE-2019-12297/): Other in n/a (critical 9.8)
- [CVE-2019-11319](https://insights.sbomify.com/CVE-2019-11319/): Command injection in n/a (critical 9.8)
- [CVE-2019-11320](https://insights.sbomify.com/CVE-2019-11320/): Missing authorization in n/a (critical 9.8)
- [CVE-2019-11322](https://insights.sbomify.com/CVE-2019-11322/): Command injection in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-21935 and fix it if it is affected.

What it is: CVE-2020-21935 is a critical command injection vulnerability in n/a, published on 21 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-2020-21935 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-2020-21935/ (Markdown: https://insights.sbomify.com/CVE-2020-21935/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-21935
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-21935
- OSV: https://osv.dev/vulnerability/CVE-2020-21935

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-21935/
Summaries are generated and may contain mistakes; the official description above is the record.