# CVE-2018-21164: Command injection in n/a

> Authenticated attackers can execute arbitrary commands on NETGEAR routers via command injection vulnerabilities.

- **Severity:** Medium 6.8 (`CVSS:3.0/AC:L/AV:A/A:H/C:H/I:H/PR:H/S:U/UI: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:** 23 Apr 2020
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-x9hf-67xx-m36w

## What is CVE-2018-21164?

CVE-2018-21164 is a medium-severity command injection vulnerability in Netgear R6220 Firmware, published on 23 Apr 2020. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Certain NETGEAR devices are affected by command injection by an authenticated user. This affects R6220 before 1.1.0.64 and WNDR3700v5 before 1.1.0.54.

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

## Which versions are affected by CVE-2018-21164?

It affects 2 products.


Products: Netgear R6220 Firmware, Netgear Wndr3700 Firmware.

## How do I fix CVE-2018-21164?

No fix has been published for CVE-2018-21164 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-21164 being exploited?

There is no known exploitation of CVE-2018-21164 in the wild and no public exploit code.

## Other vulnerabilities in Netgear R6220 Firmware

- [CVE-2022-42221](https://insights.sbomify.com/CVE-2022-42221/): Command injection in n/a (high 8.8)
- [CVE-2017-18739](https://insights.sbomify.com/CVE-2017-18739/): Memory corruption in n/a (high 8.8)
- [CVE-2020-26929](https://insights.sbomify.com/CVE-2020-26929/): Command injection in n/a (high 7.3)
- [CVE-2021-44261](https://insights.sbomify.com/CVE-2021-44261/): Missing authorization in n/a (medium 5.3)
- [CVE-2017-18702](https://insights.sbomify.com/CVE-2017-18702/): Misconfiguration in n/a (medium 5.2)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-21164 and fix it if it is affected.

What it is: CVE-2018-21164 is a medium-severity command injection vulnerability in Netgear R6220 Firmware, published on 23 Apr 2020. 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-2018-21164 in the wild and no public exploit code.

Affected product: Netgear R6220 Firmware. 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-2018-21164/ (Markdown: https://insights.sbomify.com/CVE-2018-21164/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-21164
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-21164
- OSV: https://osv.dev/vulnerability/CVE-2018-21164

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-21164/
Summaries are generated and may contain mistakes; the official description above is the record.