With emphasis on very, very limited and targeted (See MSRC Defines "very limited targeted attacks"), the Microsoft Security Response Center (MSRC) has reported that there is another new vulnerability in Microsoft word. According to the report, the initial investigation indicates that this is a different issue than that reported in Security Advisory 929433.
It appears that this vulnerability affects Word 2000, Word 2002, Word 2003 and the Word Viewer 2003. Word 2007 is NOT affected by the vulnerability.
If you believe you are affected, contact Product Support Services. In the U.S. and Canada, help with security update issues or viruses can be obtained at no charge using the PC Safety line (1-866-PC-SAFETY). For help locations, go to http://support.microsoft.com/security.