Which raises multiple questions of:
What O/S the server was running?
Was it properly patched?
Was it's Anti-virus up to date?
Could any of the pax hack in through their Wifi connections?
etcetc.
The 777 has highly specialized software running, not your typical windows desktop, or unix for that matter. It is in that sense a generation behind the likes of 787 and A380, which are running on more 'pc like' computers. While the 777 does have a sort of central computer (AIMS) it still is not much more than a rack of proprietary (Honeywell) avionics boxes which are more tightly integrated than previous generations (pre 777).
777 has no server really, it has patches but these are general software (Blockpoints) updates. Don't think virus are an issue. Hacking wifi (if installed, might require access to the maintenance terminals) is not an issue.