Market for zero-day exploits

A zero-day exploit is a type of software flaw that hackers can use to get access to networks or computer systems, sometimes before the owners of the systems even know that the flaw exists. Because these flaws are so valuable to hackers, there is a market where they can sell what they find to other hackers or to companies who are looking to secure their systems. In the market, hackers list the flaws and give a description of the exploit, and then other people can offer to buy them. The people who buy the zero-day exploit can then use it to gain access to systems.