It’s been a busy month for MS.
Just last week MS released an unscheduled security patch for the zero-day RCE patch.
So, May 13th will be ‘Patch Tuesday’ and as usual MS has delineated what will be in the update.
You can read about it here: https://technet.microsoft.com/library/security/ms14-may in far more detail as to what each patch is, and the software affected broken down in the Executive Summary and the “Software Affected” tables as well as the breakdown by OS.
The Malicious Software Removal Tool will be updated as well.
Suffice it to say, this is an update not to be ignored. You can also expect an Adobe Update also on the 13th.
Source:
http://www.neowin.net/news/microsoft-to-release-two-critical-and-six-important-security-updates-may-13