Microsoft Publisher 2003 SP3 does not properly check the data type of an unspecified return value, which allows remote attackers to execute arbitrary code via a crafted Publisher file, aka "Publisher Return Value Validation Vulnerability."
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A16525
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2013/ms13-042