# CVE-2025-4114: Netgear JWNR2000v2 check_language_file buffer overflow

> Remote attackers can exploit a buffer overflow in the check_language_file function to execute arbitrary code on Netgear JWNR2000v2 routers.

- **Severity:** High 8.7 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 30 Apr 2025
- **Updated:** 30 Apr 2025
- **Also known as:** GHSA-jvjx-8r65-mrp9

## What is CVE-2025-4114?

CVE-2025-4114 is a high-severity memory corruption vulnerability in Netgear JWNR2000v2, published on 30 Apr 2025. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A vulnerability classified as critical has been found in Netgear JWNR2000v2 1.0.0.11. Affected is the function check_language_file. The manipulation of the argument host leads to buffer overflow. It is possible to launch the attack remotely. The vendor was contacted early about this disclosure but did not respond in any way.

Weakness: CWE-120 (Buffer Copy without Checking Size of Input), CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer)

## Which versions are affected by CVE-2025-4114?

It affects 1 product.


Products: Netgear Jwnr2000 Firmware.

## How do I fix CVE-2025-4114?

No fix has been published for CVE-2025-4114 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-4114 being exploited?

There is no known exploitation of CVE-2025-4114 in the wild and no public exploit code.

## Other vulnerabilities in Netgear JWNR2000v2

- [CVE-2025-4115](https://insights.sbomify.com/CVE-2025-4115/): Netgear JWNR2000v2 default_version_is_new buffer overflow (high 8.7)
- [CVE-2025-4116](https://insights.sbomify.com/CVE-2025-4116/): Netgear JWNR2000v2 get_cur_lang_ver buffer overflow (high 8.7)
- [CVE-2025-4117](https://insights.sbomify.com/CVE-2025-4117/): Netgear JWNR2000v2 sub_41A914 buffer overflow (medium 5.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-4114 and fix it if it is affected.

What it is: CVE-2025-4114 is a high-severity memory corruption vulnerability in Netgear JWNR2000v2, published on 30 Apr 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2025-4114 in the wild and no public exploit code.

Affected product: Netgear JWNR2000v2. 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-2025-4114/ (Markdown: https://insights.sbomify.com/CVE-2025-4114/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-4114
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-4114
- OSV: https://osv.dev/vulnerability/CVE-2025-4114

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From sbomify Insights: https://insights.sbomify.com/CVE-2025-4114/
Summaries are generated and may contain mistakes; the official description above is the record.