Coin-sized device can hack a Boeing 737’s Flight Management Computer, mess with takeoff weights, or even divert an aircraft — gadget connects to an easily accessible port that overrides commands from the pilots, uses in-flight Wi-Fi

Security researchers discovered a way to tap into the avionics of a Boeing 737 and remotely give its flight management computer erroneous data through in-flight Wi-Fi. This coin-sized device plugs into a diagnostic port in the plane's avionics bay and could easily be hidden behind its protective dust cover.