# CVE-2025-12942: Improper input validation in NETGEAR R6260 and R6850

> Unauthenticated LAN attackers with MiTM and DNS control can execute arbitrary commands on NETGEAR R6260 and R6850 routers.

- **Severity:** Medium 4.8 (`CVSS:4.0/AV:A/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/AU:N/R:U/V:D/RE:L/U:Amber`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 11 Nov 2025
- **Updated:** 26 Feb 2026
- **Also known as:** GHSA-83g8-4c46-g95x

## What is CVE-2025-12942?

CVE-2025-12942 is a medium-severity command injection vulnerability in Netgear R6260 Firmware, published on 11 Nov 2025. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Improper Input Validation vulnerability in NETGEAR R6260 and NETGEAR R6850 allows unauthenticated attackers connected to LAN with ability to perform MiTM attacks and control over DNS Server to perform command execution.This issue affects R6260: through 1.1.0.86; R6850: through 1.1.0.86.

Weakness: CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2025-12942?

It affects 2 products.


Products: Netgear R6260 Firmware, Netgear R6850 Firmware.

## How do I fix CVE-2025-12942?

No fix has been published for CVE-2025-12942 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-12942 being exploited?

There is no known exploitation of CVE-2025-12942 in the wild and no public exploit code.

## Other vulnerabilities in Netgear R6260 Firmware

- [CVE-2021-34978](https://insights.sbomify.com/CVE-2021-34978/): Memory corruption in R6260 (high 8.8)
- [CVE-2021-34979](https://insights.sbomify.com/CVE-2021-34979/): Memory corruption in R6260 (high 8.8)
- [CVE-2021-34980](https://insights.sbomify.com/CVE-2021-34980/): Memory corruption in R6260 (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-12942 and fix it if it is affected.

What it is: CVE-2025-12942 is a medium-severity command injection vulnerability in Netgear R6260 Firmware, published on 11 Nov 2025. 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-2025-12942 in the wild and no public exploit code.

Affected product: Netgear R6260 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-2025-12942/ (Markdown: https://insights.sbomify.com/CVE-2025-12942/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-12942
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-12942
- OSV: https://osv.dev/vulnerability/CVE-2025-12942

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-12942/
Summaries are generated and may contain mistakes; the official description above is the record.