Microsoft says its systems were accessed by Russian state-backed attackers.
Mandatory Credit:	Getty Images via CNN Newsource

Microsoft says its systems were accessed by Russian state-backed attackers.
Mandatory Credit: Getty Images via CNN Newsource

Stories this photo appears in:

Tease photo

Russian hackers breached key Microsoft systems

Russian state-backed hackers gained access to some of Microsoft’s core software systems in a hack first disclosed in January, the company said Friday, revealing a more extensive and serious intrusion into Microsoft’s systems than previously known.