source: http://www.securityfocus.com/bid/1034/info

A vulnerability exists within the Microsoft Clip Art Gallery, where a remote user can crash the Clip Art application or possibly execute arbitrary code.

Clip art can be downloaded from any website and incorporated into the local gallery. A particular file format called .CIL is used in order to transport new clip art files to the users. The vulnerability is that a user may open a malformed .CIL file containing a long embedded field downloaded from a malicious third-party website or in the form of an email attachment regardless of it's origin.

https://github.com/offensive-security/exploit-database-bin-sploits/raw/master/bin-sploits/19789.bad