Microsoft Word 2003 SP3 and Word Viewer allow remote attackers to execute arbitrary code via crafted shape data in a Word document, aka "Word Shape Corruption Vulnerability."
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A16229
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2013/ms13-043