March’s Patch Tuesday includes five bulletins, two rated “Critical” and three rated “Important”. The first of the two “Critical” bulletins is MS14-012. This patch fixes many memory corruption vulnerabilities including a zeroday vulnerability in Internet Explorer being exploited in the wild.
Three other patches affect the Windows operating systems and probably represent the last patches we will see for the Windows XP platforms. Official support for Windows XP as well as Office 2003 is ending on April 8th and we recommend that users upgrade immediately. An update for Silverlight also marks the rare occasion where Patch Tuesday affects the Mac OS X platform.