Microsoft Word 2002, 2000, 97, and 98(J) does not properly check certain properties of a document, which allows attackers to bypass the macro security model and automatically execute arbitrary macros via a malicious document.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A188
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2003/ms03-035