A vulnerability has been identified in Microsoft Office, which could beexploited by attackers to cause a denial of service or potentially takecomplete control of an affected system. This flaw is due to a memoryaccess error in the "mso.dll" library when handling a malformeddocument, which could be exploited by attackers to crash a vulnerableapplication or execute arbitrary commands by convincing a user to opena specially crafted Word document.
Note : A proof of concept exploit has been released.