# CVE-2025-4142: Netgear EX6200 sub_3C8EC buffer overflow

> Remote attackers can trigger a buffer overflow in the Netgear EX6200 via the host argument, potentially leading to code execution.

- **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:** 1 May 2025
- **Also known as:** GHSA-gxrr-m392-473j

## What is CVE-2025-4142?

CVE-2025-4142 is a high-severity memory corruption vulnerability in Netgear Ex6200 Firmware, 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 has been found in Netgear EX6200 1.0.3.94 and classified as critical. This vulnerability affects the function sub_3C8EC. The manipulation of the argument host leads to buffer overflow. The attack can be initiated 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-2025-4142?

It affects 1 product.


Products: Netgear Ex6200 Firmware.

## How do I fix CVE-2025-4142?

No fix has been published for CVE-2025-4142 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-4142 being exploited?

There is no known exploitation of CVE-2025-4142 in the wild and no public exploit code.

## Other vulnerabilities in Netgear Ex6200 Firmware

- [CVE-2023-38926](https://insights.sbomify.com/CVE-2023-38926/): Memory corruption in n/a (high 8.8)
- [CVE-2017-18748](https://insights.sbomify.com/CVE-2017-18748/): Misconfiguration in n/a (high 8.8)
- [CVE-2025-4145](https://insights.sbomify.com/CVE-2025-4145/): Netgear EX6200 sub_3D0BC buffer overflow (high 8.7)
- [CVE-2025-4146](https://insights.sbomify.com/CVE-2025-4146/): Netgear EX6200 sub_41940 buffer overflow (high 8.7)
- [CVE-2025-4147](https://insights.sbomify.com/CVE-2025-4147/): Netgear EX6200 sub_47F7C buffer overflow (high 8.7)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-4142 and fix it if it is affected.

What it is: CVE-2025-4142 is a high-severity memory corruption vulnerability in Netgear Ex6200 Firmware, 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-2025-4142 in the wild and no public exploit code.

Affected product: Netgear Ex6200 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-2025-4142/ (Markdown: https://insights.sbomify.com/CVE-2025-4142/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-4142
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-4142
- OSV: https://osv.dev/vulnerability/CVE-2025-4142

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-4142/
Summaries are generated and may contain mistakes; the official description above is the record.