"code with administrator privileges able to perform actions only an administrator should be able to do"
This is not news, nor a vulnerability. Show me an application that can't be hooked in to in some way given the necessary permissions on the machine.
This is literally what people cracking applications do to remove licencing restrictions and game cheats do to hook in to a game and add extra functionality (like seeing through walls, automatically aiming at people, etc)
On the other side of the argument, its an impressive thing to reverse engineer an application to this extent, especially one so complex!