I suppose that they could break into any system and have stockpiled a lot of exploits. The problem is that it is usually a one shot thing. The moment it goes pu

I suppose that they could break into any system and have stockpiled a lot of exploits. The problem is that it is usually a one shot thing. The moment it goes public this means it cannot be used anymore. So it is a bit like the Martin Fury - one hit kill but only limited charges.