"In reviewing the updates for this month, some vulnerabilities were identified that pose elevated risk of cyber attacks by government organizations, sometimes referred to as nation-state actors or other copycat organizations," Adrienne Hall, General Manager of Microsoft's Cyber Defense Operations Center, said in a blog post.
Microsoft distributed updates to protect against these types of risks in addition to this month's "Patch Tuesday," the security updates Microsoft rolls out each month. Windows 10, Windows 8.1, Windows 7 and Windows Server releases after 2008 will be updated automatically. Earlier Windows will have to install the updates manually.
It isn't clear whether Microsoft was tipped off to a possible upcoming attack or not. Windows hacks has been in the spotlight since last month when the WannaCry pandemic struck, exposing Windows vulnerabilities.