cgi-bin/reboot.cgi on Seowon Intech SWC-9100 routers allows remote attackers to (1) cause a denial of service (reboot) via a default_reboot action or (2) reset all configuration values via a factory_default action.
The ping functionality in cgi-bin/diagnostic.cgi on Seowon Intech SWC-9100 routers allows remote attackers to execute arbitrary commands via shell metacharacters in the ping_ipaddr parameter.