On Netis WF2411 with firmware 2.1.36123 and other Netis WF2xxx devices (possibly WF2411 through WF2880), there is a stack-based buffer overflow that does not require authentication. This can cause denial of service (device restart) or remote code execution. This vulnerability can be triggered by a GET request with a long HTTP "Authorization: Basic" header that is mishandled by userauth->userok in /bin/boa.
Netis WF2780 2.3.40404 and WF2411 1.1.29629 devices allow Shell Metacharacter Injection into the ping command, leading to remote code execution.