It depends how remote the PC / Tablet is, if it's on your Local Area Network, in other words if the HDR-FOX T2 and the PC / Tablet are in the same house, then the answer is no you are not exposing anything to attack because everything is behind the firewall provided by your router. If however you really mean 'across the internet' then you would have to open up a path from the internet through your router to your HDR-FOX T2 and this can open up your router to attack