▻http://mobile.bloomberg.com/news/2013-06-14/u-s-agencies-said-to-swap-data-with-thousands-of-firms.html #security
“Microsoft Corp. provides intelligence agencies with information about bugs in its popular software before it publicly releases a fix. [..] Frank Shaw, a spokesman for Microsoft, said those releases occur in cooperation with multiple agencies and are designed to give government “an early start” on risk assessment and mitigation”.
In short : #Microsoft bugs are deliberate attack vectors for US intelligence.