Yahoo! Assistant "ynotifier" ActiveX Control Code Execution Vulnerability

A vulnerability has been identified in Yahoo! Assistant, which could be exploited by remote attackers to take complete control of an affected system. This issue is caused by a memory corruption error when instantiating the "ynotifier.dll" ActiveX control, which could be exploited by attackers to crash an affected browser or execute arbitrary code by tricking a user into visiting a specially crafted web page.