DLINK DIR-825 REVB 2.03 devices have an OS command injection vulnerability in the CGl interface apc_client_pin.cgi, which allows remote attackers to execute arbitrary commands via the parameter "wps_pin" passed to the apc_client_pin.cgi binary through a POST request.
https://www.dlink.com/en/security-bulletin/
https://github.com/IdaJea/IOT_vuln_1/blob/master/DIR825/wps_pin.md