pubconv.dll (aka the Publisher Converter DLL) in Microsoft Publisher 2002 SP3 does not properly perform array indexing, which allows remote attackers to execute arbitrary code via a crafted Publisher file that uses an old file format, aka "Array Indexing Memory Corruption Vulnerability."
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12277
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2010/ms10-103