Five of the 10 bulletins are rated critical, Microsoft s highest severity rating. Among the patches are fixes for a pair of IIS WebDav flaws that were publicly disclosed last month. The patches this month cover a total of 31 documented vulnerabilities affecting the Windows OS, the Internet Explorer browser and the Microsoft Office productivity suite (Word, Works and Excel) Among the fixes this month include fixes for the CanSecWest Pwn2Own vulnerability that was used to exploit Internet Explorer on Windows 7.
Source: https://threatpost.com/microsoft-unleashes-31-fixes-patch-tuesday-060909/72724/