So, as a question: Are there any security issues involved in this? Like someone could hijack the arm and control it? Because that sounds like a mad security risk if it is hackable.
If I had to guess, I'd say the software is self-contained without any outside connections while in the field. It is only operated by the wearer. So much like you can't hack a tank or night vision goggles, it would be very difficult to influence the actions of the MAXFAS without being in direct contact with it.