# CVE-2022-4390: Misconfiguration in NETGEAR Nighthawk RAX30

> A misconfiguration exposes internal SSH and Telnet services to the WAN via IPv6, allowing remote attackers to bypass firewall restrictions and access local network services.

- **Severity:** Critical 10.0 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 9 Dec 2022
- **Updated:** 14 Apr 2025
- **Also known as:** GHSA-j7vr-c84p-54jm

## What is CVE-2022-4390?

CVE-2022-4390 is a critical vulnerability in NETGEAR Nighthawk RAX30, published on 9 Dec 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A network misconfiguration is present in versions prior to 1.0.9.90 of the NETGEAR RAX30 AX2400 series of routers. IPv6 is enabled for the WAN interface by default on these devices. While there are firewall restrictions in place that define access restrictions for IPv4 traffic, these restrictions do not appear to be applied to the WAN interface for IPv6. This allows arbitrary access to any services running on the device that may be inadvertently listening via IPv6, such as the SSH and Telnet servers spawned on ports 22 and 23 by default. This misconfiguration could allow an attacker to interact with services only intended to be accessible by clients on the local network.

## Which versions are affected by CVE-2022-4390?

It affects 1 product.


Products: Netgear Ax2400 Firmware.

## How do I fix CVE-2022-4390?

No fix has been published for CVE-2022-4390 yet. Limit exposure of the affected software until one is available.

## Is CVE-2022-4390 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2022-4390 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-4390 and fix it if it is affected.

What it is: CVE-2022-4390 is a critical vulnerability in NETGEAR Nighthawk RAX30, published on 9 Dec 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2022-4390 exists.

Affected product: NETGEAR Nighthawk RAX30. 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-2022-4390/ (Markdown: https://insights.sbomify.com/CVE-2022-4390/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-4390
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-4390
- OSV: https://osv.dev/vulnerability/CVE-2022-4390

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-4390/
Summaries are generated and may contain mistakes; the official description above is the record.