Didn't they actually have the source code leaked as well?
No matter how smart you are, there is always someone smarter.
One of the dangers of proprietary code that others can't look at and vet it. So that keeps "fresh eyes" from finding holes that might otherwise be caught.
Given what companies in the news have been doing with regard to "plugging up" holes, it seems like they are really not any smarter then the average joe at times.