mIRC 6.12 has been released! (October 13th 2003)

mIRC v6.12 has been released to address a remote vulnerability found yesterday, capable of crashing your mIRC. The vulnerability affects versions of mIRC from v6.0 onwards, so it is highly recommended that you upgrade to mIRC v6.12. You can do so by downloading the new mIRC from http://www.mirc.com/get.html

Source: mIRC Subscription Service

EDIT: 6.12 has a new exploit now...A buffer exploit. :wacko: