The second Tuesday of every month, Microsoft issues the latest security and vulnerability patches for Windows, Microsoft Office, Internet Explorer and a variety of other software products. Microsoft Security Bulletin Advance Notification, or better known as "Patch Tuesday" keeps consumers and businesses up-to-date with the latest in security patches.
Over the course of the past year, Microsoft has issued a total of 106 bulletins, patching 247 vulnerabilities, 57 more security vulnerabilities than last year. Out of the 106 bulletins, 41 were labeled as critical, Microsoft's highest security warning, 60 bulletins were labeled as important, and 5 marked as moderate. No patches this year were labeled as "low."
All versions of Internet Explorer, 5-8, all received a total of five patches over the course of last year, a slight improvement over the previous year.
Windows XP received the most Windows patches this year, a total of 58, which fixed a number of remote code executions, elevation of privileges, denial of service and many more. Windows Vista followed closely behind with a total of 52 patches, while Windows 7 received a total of 52.
Windows Server 2003 received 54 patches, two fewer than Windows Server 2008, which had a total of 56.
Microsoft Office XP and Office 2003 had a total of 14 patches, Office 2007 received a total of 13 patches, and Office 2010 only received 3. Microsoft Office 2004 and 2008 for Mac both received a total of 8 patches and 2011 only received one, shortly after its release.