Microsoft has released its latest security bulletins covering 31 security vulnerabilities. In a total of 10 bulletins 5 turned out as critical, the highest security rating by Microsoft.  See details below:
(extracted from http://www.microsoft.com/technet/security/bulletin/ms09-jun.mspx)
MS08-018 (Critical): Fixes two privately reported vulnerabilities in implementations of Active Directory on Microsoft Windows 2000 Server and Windows Server 2003, and [...]