“Like most technologies, the exploits have a dual use. They can be used as part of research efforts to help strengthen computers against intrusion. But they can also be weaponized and deployed aggressively for everything from government spying and corporate espionage to flat-out fraud. Now, as cyberwar escalates across the globe, there are fears that the burgeoning trade in finding and selling exploits is spiralling out of control—spurring calls for new laws to rein in the murky trade.”
Source:Zero-day exploits: Should the hacker gray market be regulated? – Slate Magazine