Hacked devices don"t go up in smoke, but the software on the devices is almost entirely wiped out. For most people, most of the time, this would render hacked devices into paperweights.A vulnerable device is one that exposes the Telnet service to the Internet at large. The vulnerable device might be your router, or, if the router supports UPnP, then any device on your network could be vulnerable.Fortunately there is an easy way to test if a device on yourhome network is vulnerable.