TP-Link TL-MR6400/Archer MR600 v2/v3/v5/v8 File Upload path traversal

Summaryinfo

A vulnerability identified as very critical has been detected in TP-Link TL-MR6400 and Archer MR600 v2/v3/v5/v8. Affected by this vulnerability is an unknown functionality of the component File Upload. The manipulation leads to path traversal. This vulnerability is referenced as CVE-2026-76652. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability was found in TP-Link TL-MR6400 and Archer MR600 v2/v3/v5/v8 and classified as very critical. This issue affects some unknown functionality of the component File Upload. The manipulation with an unknown input leads to a path traversal vulnerability. Using CWE to declare the problem leads to 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. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

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.

It is possible to read the advisory at tp-link.com. The identification of this vulnerability is CVE-2026-76652 since 08/19/2026. The exploitation is known to be easy. The attack may be initiated remotely. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 09/10/2026). The attack technique deployed by this issue is T1006 according to MITRE ATT&CK.

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

Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

• Router Operating System

Vendor

• TP-Link

Name

• Archer MR600
• TL-MR6400

Version

• v2
• v3
• v5
• v8

License

• commercial

Website

• Vendor: https://www.tp-link.com/

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Entryinfo

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