In the ever-evolving landscape of cybersecurity, zero-day vulnerabilities represent some of the most dangerous threats. These vulnerabilities are unknown to the software vendor and can be exploited by attackers before a fix is available. Understanding what zero-day vulnerabilities are, how they work, and how to protect against them is crucial for anyone involved in cybersecurity. What Are Zero-Day Vulnerabilities Zero-day vulnerabilities refer to flaws in software that are unknown to the vendor. Because the vendor is unaware of the issue, no patch or fix has been developed, leaving the system exposed. Attackers who discover these vulnerabilities can exploit them to gain unauthorized access, steal data, or cause other forms of damage. The term "zero-day" signifies that the vendor has had zero days to address and mitigate the vulnerability. How Zero-Day Exploits Work Attackers use various techniques to identify and exploit zero-day vulnerabilities. Once a vulnerability is found