Countdown to Zero Day: Stuxnet and the Launch of the World's First Digital Weapon

by Kim Zetter

Although governments still produce their own exploits—the NSA employs teams for this—they also outsource to other firms because the demand for exploits has grown, as has the cost of producing them: two or three years ago, a single vulnerability was sufficient to gain root-level access to a machine. But today, it can take multiple ones to bypass security protections to achieve the same results.