Zero-Day Vulnerability

A zero-day vulnerability is a security flaw in software that is unknown to the software maker or security experts. Because it's undiscovered, hackers can exploit the flaw to access or damage systems before developers have a chance to fix it. The term "zero-day" indicates that developers have had zero days to address the issue. These vulnerabilities are particularly dangerous because they can be used for data theft, malware installation, or other malicious activities, often without the user's knowledge. Once the flaw is discovered, a patch or fix can be released to protect users.