An access control issue in Wavlink WN533A8 M33A8.V5030.190716 allows attackers to obtain usernames and passwords via view-source:http://IP_ADDRESS/sysinit.shtml?r=52300 and searching for [logincheck(user);].
https://drive.google.com/file/d/18ECQEqZ296LDzZ0wErgqnNfen1jCn0mG/view?usp=sharing
http://packetstormsecurity.com/files/167890/Wavlink-WN533A8-Password-Disclosure.html