# CVE-2018-21137: Hardcoded credentials in n/a

> Attackers can use hardcoded passwords to gain unauthorized access to NETGEAR D3600 and D6000 routers.

- **Severity:** High 8.8 (`CVSS:3.0/AC:L/AV:A/A:H/C:H/I:H/PR:N/S:U/UI:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **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-jf4p-jr83-j8vp

## What is CVE-2018-21137?

CVE-2018-21137 is a high-severity vulnerability in Netgear D3600 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 a hardcoded password. This affects D3600 before 1.0.0.76 and D6000 before 1.0.0.76.

Weakness: CWE-798 (Use of Hard-coded Credentials)

## Which versions are affected by CVE-2018-21137?

It affects 2 products.


Products: Netgear D3600 Firmware, Netgear D6000 Firmware.

## How do I fix CVE-2018-21137?

No fix has been published for CVE-2018-21137 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-21137 being exploited?

There is no known exploitation of CVE-2018-21137 in the wild and no public exploit code.

## Other vulnerabilities in Netgear D3600 Firmware

- [CVE-2020-35799](https://insights.sbomify.com/CVE-2020-35799/): Memory corruption in n/a (high 8.8)
- [CVE-2018-21207](https://insights.sbomify.com/CVE-2018-21207/): Memory corruption in n/a (high 8.8)
- [CVE-2018-21210](https://insights.sbomify.com/CVE-2018-21210/): Memory corruption in n/a (high 8.8)
- [CVE-2018-21211](https://insights.sbomify.com/CVE-2018-21211/): Memory corruption in n/a (high 8.8)
- [CVE-2018-21212](https://insights.sbomify.com/CVE-2018-21212/): Memory corruption in n/a (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-21137 and fix it if it is affected.

What it is: CVE-2018-21137 is a high-severity vulnerability in Netgear D3600 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-2018-21137 in the wild and no public exploit code.

Affected product: Netgear D3600 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-2018-21137/ (Markdown: https://insights.sbomify.com/CVE-2018-21137/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-21137
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-21137
- OSV: https://osv.dev/vulnerability/CVE-2018-21137

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-21137/
Summaries are generated and may contain mistakes; the official description above is the record.