0days are not magic. Stare enough at code and you will find them. E&Y and the other Professional Services companies have a big pentesting team, and they would h

0days are not magic. Stare enough at code and you will find them. E&Y and the other Professional Services companies have a big pentesting team, and they would have made discoveries on their own regarding system security. Any company with a large security / research team would have 0days. What they do with them, (report, sit, burn, etc) is up the organizational and individual ethics of the operator.