Microsoft XML Core Services (aka MSXML) 4.0, 5.0, and 6.0 does not properly parse XML content, which allows remote attackers to execute arbitrary code via a crafted web page, aka "MSXML XSLT Vulnerability."
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A15458
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2013/ms13-002