# CVE-2026-76652: Authenticated Directory Traversal Vulnerability in File Upload Functionality in TP-Link TL-MR6400 and Archer MR600

> Authenticated attackers can upload crafted files to unintended locations, potentially overwriting system files on TP-Link routers.

- **Severity:** Medium 4.8 (`CVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 10 Sep 2026
- **Updated:** 10 Sep 2026
- **Also known as:** GHSA-q3j6-99qm-jjmm

## What is CVE-2026-76652?

CVE-2026-76652 is a medium-severity path traversal vulnerability in TP-Link Systems Inc. Archer MR600, published on 10 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

An
authenticated directory traversal vulnerability in file upload functionality has
been identified in Archer MR600 (v2, v3 & v5) and TL-MR6400 v8. Due to insufficient validation of user-supplied file
information, an authenticated remote attacker with access to the affected
upload functionality could upload a specially crafted file and cause it to be
written outside the intended directory. 

Successful
exploitation could allow an authenticated remote attacker to write files to
unintended locations, potentially overwriting or modifying files
accessible to the affected service; arbitrary code execution has not
been demonstrated.

Weakness: CWE-22 (Improper Limitation of a Pathname to a Restricted Directory)

## Which versions are affected by CVE-2026-76652?


## How do I fix CVE-2026-76652?

No fix has been published for CVE-2026-76652 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-76652 being exploited?

There is no known exploitation of CVE-2026-76652 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-76652 and fix it if it is affected.

What it is: CVE-2026-76652 is a medium-severity path traversal vulnerability in TP-Link Systems Inc. Archer MR600, published on 10 Sep 2026. 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-2026-76652 in the wild and no public exploit code.

Affected product: TP-Link Systems Inc. Archer MR600. 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-2026-76652/ (Markdown: https://insights.sbomify.com/CVE-2026-76652/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-76652
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-76652
- OSV: https://osv.dev/vulnerability/CVE-2026-76652

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-76652/
Summaries are generated and may contain mistakes; the official description above is the record.