Microsoft has released the latest monthly security updates for November 2008 and has made them available for download from the Microsoft Download Center and also from Windows Update/Microsoft Update.

Critical: KB955218: Vulnerabilities in Microsoft XML Core Services Could Allow Remote Code Execution

Important: KB957097: Vulnerability in SMB Could Allow Remote Code Execution

Microsoft has released the usual update for the Windows Malicious Software Removal Tool and the Windows Mail Definition Update (x86) (x64).

More info: Microsoft Security Bulletin Summary for November 2008