Affected: TP-Link Systems Inc. RE190 v5, TP-Link Systems Inc. RE200 v5, TP-Link Systems Inc. RE205 v4, TP-Link Systems Inc. RE215 v1, TP-Link Systems Inc. RE220 v3, TP-Link Systems Inc. RE230 v2, TP-Link Systems Inc. RE300 v2, TP-Link Systems Inc. RE305 v4, TP-Link Systems Inc. RE330 v1, TP-Link Systems Inc. RE335 v1 and 6 more

Multiple TP-Link Wi-Fi range extenders use a custom, reversible XOR-and-dictionary transformation in the HTTP web-management login flow. An unauthenticated attacker on the same local network who can capture the network traffic associated with legitimate administrator login may be able to derive an alternative credential value that produces the same accepted authentication result and use it to authenticate to the device’s web-management interface with administrator privileges. Exploitation requires the management login to use HTTP and the attacker to observe the session key, dictionary, and login value associated with a legitimate administrator login.

Successful exploitation may allow an unauthenticated adjacent attacker to gain administrator access to the affected device and modify exposed configuration settings.