Desautels declines to reveal much about his customers but says he screens them to avoid selling vulnerability data to cybercriminals.

FORBES: On The Cover/Top Stories

Adriel Desautels, the chief executive of cybersecurity firm Snosoft, buys and sells software-vulnerability data in a growing gray market and says the demand for critical Apple bugs has steadily increased.

FORBES: On The Cover/Top Stories

If you watch my interview with its founder, Niels Henrik Rasmussen, you will learn that Secunia maintains and licenses a comprehensive vulnerability data base of all (well, a lot of) products, not just Microsoft.

FORBES: Vulnerability Intelligence Versus Vulnerability Management