TP-Link Tapo Cloud Service Proxy Topic access control

Summaryinfo

A vulnerability was found in TP-Link Tapo Cloud Service. It has been declared as very critical. This affects an unknown function of the component Proxy Topic. The manipulation results in access control. This vulnerability was named CVE-2026-105821. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability was found in TP-Link Tapo Cloud Service (version now known). It has been classified as very critical. Affected is some unknown processing of the component Proxy Topic. The manipulation with an unknown input leads to a access control vulnerability. CWE is classifying the issue as CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

The Tapo Cloud MQTT broker contains a broken access control vulnerability in a proxy topic used by authenticated Tapo devices to request service tokens. The broker does not verify that the device ID supplied in a proxy request belongs to the authenticated device. An attacker who owns a Tapo device and knows another device's ID may obtain a device token scoped to the target device and use it to upload attacker-controlled content to the target user's Tapo Cloud storage. The content may then be presented in the Tapo app as a legitimate event. Successful exploitation may allow an attacker to upload attacker-controlled content that is presented to a target user as a legitimate Tapo event, retrieve internal service information through crafted proxy requests, or abuse Tapo Cloud outbound request capability in activity that could affect service availability.

The advisory is shared for download at tp-link.com. This vulnerability is traded as CVE-2026-105821 since 10/05/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 11/03/2026). The MITRE ATT&CK project declares the attack technique as T1068.

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

Type

• Cloud Software

Vendor

• TP-Link

Name

• Tapo Cloud Service

License

• commercial

Website

• Vendor: https://www.tp-link.com/

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