# CVE-2021-45539: Command injection in n/a

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

- **Severity:** High 8.4 (`CVSS:3.1/AC:L/AV:A/A:H/C:H/I:H/PR:H/S:C/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:** 26 Dec 2021
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-f2mp-9rff-mjgp

## What is CVE-2021-45539?

CVE-2021-45539 is a high-severity command injection vulnerability in Netgear R7900p Firmware, published on 26 Dec 2021. 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 R7900P before 1.4.2.84, R7960P before 1.4.2.84, R8000 before 1.0.4.74, R8000P before 1.4.2.84, MR60 before 1.0.6.110, RAX20 before 1.0.2.82, RAX45 before 1.0.2.28, RAX80 before 1.0.3.106, MS60 before 1.0.6.110, RAX15 before 1.0.2.82, RAX50 before 1.0.2.28, and RAX75 before 1.0.3.106.

Weakness: CWE-77 (Improper Neutralization of Special Elements used in a Command)

## Which versions are affected by CVE-2021-45539?

It affects 12 products.


Products: Netgear Mr60 Firmware, Netgear Ms60 Firmware, Netgear R7900p Firmware, Netgear R7960p Firmware, Netgear R8000 Firmware, Netgear R8000p Firmware, Netgear Rax15 Firmware, Netgear Rax20 Firmware, Netgear Rax45 Firmware, Netgear Rax50 Firmware, Netgear Rax75 Firmware, Netgear Rax80 Firmware.

## How do I fix CVE-2021-45539?

No fix has been published for CVE-2021-45539 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-45539 being exploited?

There is no known exploitation of CVE-2021-45539 in the wild and no public exploit code.

## Other vulnerabilities in Netgear R7900p Firmware

- [CVE-2022-48322](https://insights.sbomify.com/CVE-2022-48322/): Memory corruption in n/a (critical 9.8)
- [CVE-2021-45540](https://insights.sbomify.com/CVE-2021-45540/): Command injection in n/a (high 8.4)
- [CVE-2021-45541](https://insights.sbomify.com/CVE-2021-45541/): Command injection in n/a (high 8.4)
- [CVE-2022-48176](https://insights.sbomify.com/CVE-2022-48176/): Memory corruption in n/a (high 7.8)
- [CVE-2026-11739](https://insights.sbomify.com/CVE-2026-11739/): Command injection vulnerability in some NETGEAR Nighthawk devices (medium 4.9)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-45539 and fix it if it is affected.

What it is: CVE-2021-45539 is a high-severity command injection vulnerability in Netgear R7900p Firmware, published on 26 Dec 2021. 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-2021-45539 in the wild and no public exploit code.

Affected product: Netgear R7900p 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-2021-45539/ (Markdown: https://insights.sbomify.com/CVE-2021-45539/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-45539
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-45539
- OSV: https://osv.dev/vulnerability/CVE-2021-45539

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-45539/
Summaries are generated and may contain mistakes; the official description above is the record.