TP-Link Archer AX90 TDDPv2 service /usr/bin/tddp command injection

Summaryinfo

A vulnerability classified as very critical has been found in TP-Link Archer AX90. Affected by this vulnerability is an unknown functionality of the file /usr/bin/tddp of the component TDDPv2 service. The manipulation leads to command injection. This vulnerability is referenced as CVE-2026-84682. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability was found in TP-Link Archer AX90 (version now known). It has been rated as very critical. This issue affects some unknown processing of the file /usr/bin/tddp of the component TDDPv2 service. The manipulation with an unknown input leads to a command injection vulnerability. Using CWE to declare the problem leads to CWE-77. The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

A command injection vulnerability exists in the TDDPv2 service (/usr/bin/tddp) on Archer AX90 V1. An unauthenticated adjacent-network attacker can exploit the setProductVer command handler to execute arbitrary operating system commands as root during device boot.  Successful exploitation may result in complete device compromise through arbitrary command execution with root privileges.

It is possible to read the advisory at tp-link.com. The identification of this vulnerability is CVE-2026-84682 since 09/02/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 10/01/2026). The attack technique deployed by this issue is T1202 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.

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Productinfo

Vendor

• TP-Link

Name

• Archer AX90

License

• commercial

Website

• Vendor: https://www.tp-link.com/

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