This is a remote system access vulnerability caused by an ActiveX flaw. This is fixed by upgrading Windows Opera versions to Opera 9.21:

Secunia is reporting a highly critical ActiveX remote system access threat in Norton Internet Security 2004, Norton IS 2004 Professional, and Norton Personal Firewall 2004.

I hope none of you are relying on Norton security tools dating back to 2004,  but remember that you may have telecommuters, especially occasional telecommuters or road warriors who are taking old laptops out in an emergency. Those users may well have old security and feel they are protected, especially those using a personal firewall.