A bug bounty program is a system in which a company or organization offers rewards to individuals who discover and report vulnerabilities in their software or systems. These programs have become increasingly popular in recent years as a way for companies to improve their cybersecurity posture and protect against cyber threats.

A "0-day" in cybersecurity refers to a previously unknown vulnerability in software or hardware that can be exploited by attackers. These vulnerabilities are typically discovered by researchers or hackers and can be used to gain unauthorized access to a system, steal sensitive information, or even disrupt operations.