Security Override will not work right now unless you take off ALL other precepts. If you want to use Vacuum/Fetch alongside your Moa, you need to play as Khora and use Fetch on Venari. Currently that is the only workaround to this problem. Once you only have Security Override as the only precept mod on your Moa, it works swimmingly, hacking terminals in 2 seconds flat just like it says.
There is, however, additional issues with the Moa's path-finding and terminal priorities. Sometimes if you're in a Spy mission and at the door just before the A, B, or C terminal, the Moa may not hack the door before it, as it's actually aiming to go hack the [A,B, or C] terminal instead, even though there's a door in the way. It may sometimes attempt to hack terminals that are inactive, as well.
What DE needs to do, is add in a check for the moa, that if there's any obstructions preventing it from going where it wants, re-check for nearby hack-able terminals closest to the Moa instead.
That, or simply make the Moa prioritize nearby terminals only, or ones closest to the Warframe/Operator. If waypoints worked, too, that would be great, but I doubt they'll go that far with it.