Microsoft has pushed out the IE Cumulative Security Update for December 2009 via Windows Update and Microsoft Update.
The update is rated as critical for Internet Explorer 5.01, 6, 6 SP1, 7, and 8 for all versions of Windows except Windows Server 2003, 2008, and 2008 R2 where the update is only rated as moderate.
The update fixes five reported vulnerabilities in the browsers.
Being a cumulative update, it contains all previously released updated for Internet Explorer and is recommended for all users.
More information on the update can be found below: