security bulletin 

We are schedule released a security bulletin (out-of-band) to address a vulnerability in Internet Explorer on all currently supported versions of Windows. The bulletin is scheduled for release at approximately 10 A.M. Pacific Time on Wednesday, December 17, 2008.

More on this update can be found below with links and recommendations.  Please review this information and apply to your systems where appropriate.

Recommendations

Microsoft recommends customers prepare their systems and networks to apply this security bulletin immediately once released to help ensure that their computers are protected from attempted criminal attacks. For more information about security updates, visit http://www.microsoft.com/protect.

Bulletin Identifier Maximum Severity Affected Products Impact Detection Restart Requirement
MS08-Dec

Critical

Microsoft Windows, Internet Explorer Remote Code Execution Microsoft Baseline Security Analyser May Require Restart

Microsoft Baseline Security Analyzer can be used to scan for this vulnerability.  It’s a great tool to check for security issues within your environments.

If you want to find out more about this security update then check out the Microsoft Security Response Center blog.  They are updating regularly on what they are doing in regards to this update.  They have posted very detailed information about the status of this update so it’s a good place to find out the latest.

Jeffa