# CVE-2021-45642: Misconfiguration in n/a

> Incorrect security settings in NETGEAR router firmware allow attackers to bypass security controls, requiring firmware updates to remediate.

- **Severity:** High 7.5 (`CVSS:3.1/AC:L/AV:A/A:L/C:L/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-6w4x-5fpc-6gg8

## What is CVE-2021-45642?

CVE-2021-45642 is a high-severity vulnerability in Netgear D7800 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 incorrect configuration of security settings. This affects D7800 before 1.0.1.64, EX6250 before 1.0.0.134, EX7700 before 1.0.0.222, LBR20 before 2.6.3.50, RBS50Y before 2.7.3.22, R8900 before 1.0.5.26, R9000 before 1.0.5.26, XR450 before 2.3.2.66, XR500 before 2.3.2.66, XR700 before 1.0.1.36, EX7320 before 1.0.0.134, RAX120 before 1.2.2.24, EX7300v2 before 1.0.0.134, RAX120v2 before 1.2.2.24, EX6410 before 1.0.0.134, RBR10 before 2.7.3.22, RBR20 before 2.7.3.22, RBR40 before 2.7.3.22, RBR50 before 2.7.3.22, EX6420 before 1.0.0.134, RBS10 before 2.7.3.22, RBS20 before 2.7.3.22, RBS40 before 2.7.3.22, RBS50 before 2.7.3.22, EX6400v2 before 1.0.0.134, RBK12 before 2.7.3.22, RBK20 before 2.7.3.22, RBK40 before 2.7.3.22, and RBK50 before 2.7.3.22.

## Which versions are affected by CVE-2021-45642?

It affects 29 products.


Products: Netgear D7800 Firmware, Netgear Ex6250 Firmware, Netgear Ex6400v2 Firmware, Netgear Ex6410 Firmware, Netgear Ex6420 Firmware, Netgear Ex7300v2 Firmware, Netgear Ex7320 Firmware, Netgear Ex7700 Firmware, Netgear Lbr20 Firmware, Netgear R8900 Firmware, Netgear R9000 Firmware, Netgear Rax120 Firmware, Netgear Rax120v2 Firmware, Netgear Rbk12 Firmware, Netgear Rbk20 Firmware, Netgear Rbk40 Firmware, Netgear Rbk50 Firmware, Netgear Rbr10 Firmware, Netgear Rbr20 Firmware, Netgear Rbr40 Firmware and 9 more.

## How do I fix CVE-2021-45642?

No fix has been published for CVE-2021-45642 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-45642 being exploited?

There is no known exploitation of CVE-2021-45642 in the wild and no public exploit code.

## Other vulnerabilities in Netgear D7800 Firmware

- [CVE-2021-45618](https://insights.sbomify.com/CVE-2021-45618/): Command injection in n/a (critical 9.6)
- [CVE-2021-34947](https://insights.sbomify.com/CVE-2021-34947/): NETGEAR R7800 net-cgi Out-Of-Bounds Write Remote Code Execution Vulnerability (high 8.8)
- [CVE-2022-27641](https://insights.sbomify.com/CVE-2022-27641/): Integer overflow in R6700v3 (high 8.8)
- [CVE-2020-26909](https://insights.sbomify.com/CVE-2020-26909/): Command injection in n/a (high 8.8)
- [CVE-2018-21202](https://insights.sbomify.com/CVE-2018-21202/): Memory corruption in n/a (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-45642 and fix it if it is affected.

What it is: CVE-2021-45642 is a high-severity vulnerability in Netgear D7800 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-2021-45642 in the wild and no public exploit code.

Affected product: Netgear D7800 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-2021-45642/ (Markdown: https://insights.sbomify.com/CVE-2021-45642/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-45642
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-45642
- OSV: https://osv.dev/vulnerability/CVE-2021-45642

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-45642/
Summaries are generated and may contain mistakes; the official description above is the record.