Microsoft will be issuing seven security bulletins on 12 March for its monthly Patch Tuesday. These address four critical and three important problems; products affected are Silverlight, Office, Microsoft's server products, all supported versions of Internet Explorer and all supported versions of Windows, excluding Windows RT.

The four critical bulletins address remote code execution flaws in Windows from Windows XP SP3 onwards and Internet Explorer 6 through 10, as well as in Silverlight and Visio. A privilege escalation in SharePoint is also being fixed. For the three important bulletins, Microsoft is fixing an information disclosure in OneNote and a similar problem in Microsoft Office for Mac 2008 and 2011. The last important bulletin fixes a privilege escalation problem in Windows from Windows XP SP3 onwards. Windows RT is the only supported Windows version that is not affected.