Wavlink WN575A4, WN579X3, and WN530G3A devices through 2020-05-15 allow unauthenticated remote users to inject commands via the key parameter in a login request.
https://github.com/ice-wzl/Wavlink-WN530G3A-Cmd-Injection/blob/main/README.md
https://blog.0xlabs.com/2021/02/wavlink-rce-CVE-2020-13117.html