TP-Link TL-WR845N(UN)_V4_201214, TL-WR845N(UN)_V4_200909 and TL-WR845N(UN)_V4_190219 were discovered to contain weak default credentials for the Administrator account.

An Insecure Credential Management issue discovered in Connectize AC21000 G6 641.139.1.1256 allows attackers to gain escalated privileges via use of weak hashing algorithm.

TP-Link TL-WR845N(UN)_V4_190219 was discovered to transmit credentials in base64 encoded form, which can be easily decoded by an attacker executing a man-in-the-middle attack.