Microsoft has released the update to fix the issues with the Asian languages.  It is available on both the Windows Update site and the Office Update site. Microsoft re-released this because the update originally released on January 9th did not fully protect against the issues described in the bulletin.  The update released today corrects the problem.  For more information see:

www.microsoft.com/technet/security/Bulletin/MS07-002.mspx

If you are not running Excel or are running a version other Excel 2000 you do not need to apply the patch.  If you are running the affected version  you will be prompted to apply the new update.