Microsoft Word 2007 SP3 and Office Compatibility Pack SP3 allow remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted embedded font in a (1) .doc or (2) .docx document, aka "Embedded Font Vulnerability."
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2014/ms14-034
http://www.securitytracker.com/id/1030383
http://www.securityfocus.com/bid/67896