Zero-day (computing)

In computing, a **zero-day** refers to a newly discovered security vulnerability in software that is unknown to the organization responsible for patching or fixing it. The term "zero-day" derives from the fact that the developers have had zero days to address the security flaw since its discovery. Zero-day exploits are particularly dangerous because they can be leveraged by attackers to compromise systems, steal data, or spread malware before any protective measures are taken.