TP-Link TL-MR6400/Archer MR600/Archer MR200 ISP Upgrade path traversal

Summaryinfo

A vulnerability categorized as problematic has been discovered in TP-Link TL-MR6400, Archer MR600 and Archer MR200. Affected by this issue is some unknown functionality of the component ISP Upgrade. Executing a manipulation can lead to path traversal. This vulnerability is registered as CVE-2026-12339. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability has been found in TP-Link TL-MR6400, Archer MR600 and Archer MR200 (affected version unknown) and classified as problematic. This vulnerability affects an unknown functionality of the component ISP Upgrade. The manipulation with an unknown input leads to a path traversal vulnerability. The CWE definition for the vulnerability is CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. As an impact it is known to affect integrity, and availability. CVE summarizes:

A Zip Slip vulnerability in the WebUI ISP Upgrade functionality allows arbitrary file write via a crafted archive containing directory traversal sequences. An authenticated administrator may overwrite arbitrary files on the system.Successful exploitation may allow arbitrary file to overwrite on the underlying system, affecting system integrity and availability.

The advisory is available at tp-link.com. This vulnerability was named CVE-2026-12339 since 06/15/2026. The exploitation appears to be easy. The attack can be initiated remotely. The exploitation requires an enhanced level of successful authentication. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 08/10/2026). This vulnerability is assigned to T1006 by the MITRE ATT&CK project.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-55700). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

• Router Operating System

Vendor

• TP-Link

Name

• Archer MR200
• Archer MR600
• TL-MR6400

License

• commercial

Website

• Vendor: https://www.tp-link.com/

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Entryinfo

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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