Cross-Site Request Forgery (CSRF) exists in Green Packet DX-350 Firmware version v2.8.9.5-g1.4.8-atheeb, as demonstrated by a request to ajax.cgi that enables UPnP.
In Green Packet DX-350 Firmware version v2.8.9.5-g1.4.8-atheeb, the "PING" (aka tag_ipPing) feature within the web interface allows performing command injection, via the "pip" parameter.