Microsoft reports software bugs in their operating system to US intelligence agencies before publicly releasing a fix, allowing the agencies to exploit the bugs for their own surveillance programs by infiltrating targeted computer systems.
Instead of putting the security and privacy of their users first the company willingly exposes them to malicious actors.
archived source: https://wellthissucks.xyz/2013/06/17/microsoft-informs-the-nsa-of-bugs-in-windows-before-fixing-them-archived-source/