Description:
A vulnerability has been reported in Yahoo! Messenger, which potentially can be exploited by malicious people to compromise a user’s system.

The vulnerability is caused due to an unspecified error in an ActiveX control and can be exploited to cause a buffer overflow. No further information is currently available.

The vulnerability is reported in versions obtained prior to Nov 2, 2006.

Solution:
Update to the latest version.
http://messenger.yahoo.com/

Secunia Advisory