Update: Kaspersky who is credited with finding MS16-006,the critical Silverlight vulnerability just published their story on how the bug was found. Very interesting, has to do with the Hacking Team breach and coding "standards" – take a look at their blog post for more info. They also made clear that this vulnerability is under attack in the wild and that we are looking at a true 0-day here. This changes our priorities – we now put MS16-006 at the top of our list. Take a look at your installations, see if you have Silverlight installed and address the flaw as soon as possible.
Original: The first Patch Tuesday of 2016 turns out to be low in numbers, but broad and packing quite a punch: six of the nine bulletins are rated critical, including the Windows Kernel and Office bulletins. In addition some rather important products are going End-of-Life and get their last patch update today. Microsoft is retiring support for all older browsers on each platform and will from here on only maintain the newest browser on each version of the OS.