Below are key resources documenting this recent monthly Microsoft Patch Tuesday release

https://isc.sans.edu/forums/diary/April+2017+Microsoft+Patch+Tuesday/22288/

http://blog.talosintelligence.com/2017/04/ms-tuesday.html

https://portal.msrc.microsoft.com/en-us/security-guidance

Today on Tuesday 2017-04-11, Microsoft announced its monthly security release (also known as “Patch Tuesday).  Reviewing Microsoft’s Security Update Guide, it looks like there’s 644 updates with 210 of them listed as “Critical” severity.  The highest profile issue from this set of updates invovles CVE-2017-0199.  This vulnerablility was actively being exploited through malicious email campaigns sending Microsoft Office RTF documents as early as this past weekend.

Microsoft’s April 2017 security release consists of security updates for the following software:

***  Internet Explorer
***  Microsoft Edge
***  Microsoft Windows
***  Microsoft Office, Office Services & Web Apps
***  Visual Studio for Mac
***  NET Framework
***  Silverlight
***  Adobe Flash Player