Several widely-used vendors have released CRITICAL security updates to their products this week. Some of these flaws are being actively exploited across the internet. Updates for the affected products should be tested and applied as soon as possible.

Affected Products Overview:
Microsoft: Windows, Internet Explorer, IIS, Office, Works
https://www.microsoft.com/technet/security/bulletin/ms09-jun.mspx

Apple: Mac OS X Server 10.4, Mac OS X 10.4, Product Security, Mac OS X Server 10.5, Mac OS X 10.5, AirPort, Apple TV, iPhone, iPhoto, iPod touch, QuickTime 7, Safari
http://support.apple.com/kb/HT1222

Adobe: Acrobat and Reader
http://www.adobe.com/support/security/bulletins/apsb09-07.html