# CVE-2020-5534: Command injection in Aterm WG2600HS

> Authenticated attackers on the local network can execute arbitrary OS commands with root privileges on NEC Aterm WG2600HS routers.

- **Severity:** High 8.0 (`CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 21 Feb 2020
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-47fx-mr2m-65rq

## What is CVE-2020-5534?

CVE-2020-5534 is a high-severity command injection vulnerability in NEC Corporation Aterm WG2600HS, published on 21 Feb 2020. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Aterm WG2600HS firmware Ver1.3.2 and earlier allows an authenticated attacker on the same network segment to execute arbitrary OS commands with root privileges via unspecified vectors.

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

## Which versions are affected by CVE-2020-5534?

It affects 1 product.


Products: Nec Aterm Wg2600hs Firmware.

## How do I fix CVE-2020-5534?

No fix has been published for CVE-2020-5534 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-5534 being exploited?

There is no known exploitation of CVE-2020-5534 in the wild and no public exploit code.

## Other vulnerabilities in NEC Corporation Aterm WG2600HS

- [CVE-2021-20711](https://insights.sbomify.com/CVE-2021-20711/): Command injection in Aterm WG2600HS (critical 9.8)
- [CVE-2020-5533](https://insights.sbomify.com/CVE-2020-5533/): Cross-site scripting in Aterm WG2600HS (medium 6.1)
- [CVE-2021-20712](https://insights.sbomify.com/CVE-2021-20712/): Auth bypass in NEC Aterm devices (medium 5.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-5534 and fix it if it is affected.

What it is: CVE-2020-5534 is a high-severity command injection vulnerability in NEC Corporation Aterm WG2600HS, published on 21 Feb 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-2020-5534 in the wild and no public exploit code.

Affected product: NEC Corporation Aterm WG2600HS. 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-2020-5534/ (Markdown: https://insights.sbomify.com/CVE-2020-5534/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-5534
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-5534
- OSV: https://osv.dev/vulnerability/CVE-2020-5534

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-5534/
Summaries are generated and may contain mistakes; the official description above is the record.