An ActiveX control added by Norton Personal Firewall 2004 and by Norton Internet Security 2004 has a serious flaw that could permit a takeover of your PC if you open a malicious website in Internet Explorer. To get the security fix, either run Symantec LiveUpdate or pick it up from here.

See also:

Microsoft glitches hamper critical fixes

Broken Internet Explorer

Office fix delayed

Trillian IRC hole

Winamp fix