Buffer overflow in MSO.DLL in Microsoft Office XP SP3 and Office 2004 for Mac allows remote attackers to execute arbitrary code via a crafted Office document, aka "MSO.DLL Buffer Overflow."
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A8399
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2010/ms10-003