Trendnet AC2600 TEW-827DRU version 2.08B01 does not have sufficient protections for the UART functionality. A malicious actor with physical access to the device is able to connect to the UART port via a serial connection. No username or password is required and the user is given a root shell with full control of the device.
When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.
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https://www.tenable.com/security/research/tra-2021-54 | third party advisory |