# CVE-2025-6151: TP-Link TL-WR940N, TL-WR841N WanSlaacCfgRpm.htm buffer overflow

> Remote attackers can exploit a buffer overflow in unsupported TP-Link routers to potentially execute code or cause denial of service.

- **Severity:** High 8.2 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 17 Jun 2025
- **Updated:** 15 Jul 2025
- **Also known as:** GHSA-pc68-4m2q-7jqf

## What is CVE-2025-6151?

CVE-2025-6151 is a high-severity memory corruption vulnerability in TP-Link Systems INC. TL-WR841N V11, published on 17 Jun 2025. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

A vulnerability has been found in 
TP-Link TL-WR940N V4 and TL-WR841N V11. Affected by this issue is some unknown 
functionality of the file /userRpm/WanSlaacCfgRpm.htm, which may lead to buffer overflow. The attack may be 
launched remotely. This vulnerability only affects products that are no longer 
supported by the maintainer.

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-2025-6151?

It affects 1 product.


Products: Tp-Link Tl-Wr940n Firmware.

## How do I fix CVE-2025-6151?

No fix has been published for CVE-2025-6151 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-6151 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-6151 exists.

## Other vulnerabilities in TP-Link Systems INC. TL-WR841N V11

- [CVE-2023-36355](https://insights.sbomify.com/CVE-2023-36355/): Memory corruption in n/a (critical 9.9)
- [CVE-2022-24355](https://insights.sbomify.com/CVE-2022-24355/): Memory corruption in TL-WR940N (high 8.8)
- [CVE-2019-6989](https://insights.sbomify.com/CVE-2019-6989/): Memory corruption in n/a (high 8.8)
- [CVE-2026-11409](https://insights.sbomify.com/CVE-2026-11409/): OS Command Injection in IPv6 PPPoE Configuration in TP-Link TL-WR940N (high 8.5)
- [CVE-2026-11410](https://insights.sbomify.com/CVE-2026-11410/): OS Command Injection in BigPond Cable (BPA) Configuration in TP-Link TL-WR940N (high 8.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-6151 and fix it if it is affected.

What it is: CVE-2025-6151 is a high-severity memory corruption vulnerability in TP-Link Systems INC. TL-WR841N V11, published on 17 Jun 2025. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-6151 exists.

Affected product: TP-Link Systems INC. TL-WR841N V11. 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-2025-6151/ (Markdown: https://insights.sbomify.com/CVE-2025-6151/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-6151
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-6151
- OSV: https://osv.dev/vulnerability/CVE-2025-6151

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-6151/
Summaries are generated and may contain mistakes; the official description above is the record.