Microsoft released an out-of-cycle patch for the WMF vulnerability, dubbed as MS06-001. The update should now be available via Windows Update or Automatic Update. More details can be found here.
http://www.microsoft.com/technet/security/Bulletin/MS06-001.mspx
Read more of Microsoft’s statement here.
http://blogs.technet.com/msrc/archive/2006/01/05/416980.aspx
So fire up Windows Update and patch those computers!