This means the critical bulletin will affect all organizations and consumers.
Organizations will have to reboot after applying the critical patch, which indicates that it is fix for a kernel level bug. There are two important bulletins that effect the Windows family as well.
Bulletin 6 is labeled as moderate and only affects Windows operating systems post Windows 2003 Server. This means Bulletin 6 addresses issues which were introduced with Windows Vista.
Bulletin 4 affects Microsoft Visual Studio 2008 Service Pack 1, Microsoft Visual Studio 2010, and Microsoft Visual Studio 2010 Service Pack 1. This bulletin addresses Visual Studio flaw which can result in a privilege escalation.
Bulletin 5 is labeled important and addresses remote code execution in Microsoft Expression Design, which is a vector graphics editor that competes with Adobe Photoshop and Adobe Illustrator. This issue is probably related to malicious file formats that could result in a compromise of system running the software.
The Microsoft Expression Design bulletin will affect a small amount of consumers and organizations because of the limited distribution of the product.
Author: Marcus Carey, security researcher at Rapid7.