This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Microsoft Internet Explorer. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.

The specific flaw exists within the handling of arguments passed to the RtfToForeign32 function. By manipulating a document's elements an attacker can access data outside the bounds of an allocated buffer. An attacker can leverage this vulnerability to execute code under the context of the current process.

https://technet.microsoft.com/en-us/library/security/ms14-080.aspx

CVE-2014-6374