Microsoft Visio Viewer 2010 SP1 allows remote attackers to execute arbitrary code via a crafted Visio file that triggers incorrect memory allocation, aka "Visio Viewer Tree Object Type Confusion Vulnerability."
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A16300
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2013/ms13-023