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.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
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
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.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-76652 being exploited?
There is no known exploitation of CVE-2026-76652 in the wild and no public exploit code.
Sources
Also known as GHSA-q3j6-99qm-jjmm.