What is Zero-Day attack? How does Zero-Day Vulnerability lead to Zero-Day Exploitation? Explain the types of zero-day attacks.

A Zero-Day attack is a cyberattack that occurs on the same day a vulnerability is discovered in software, hardware, or firmware, before the developer has had an opportunity to create and distribute a security patch. These attacks are highly dangerous because they exploit unknown flaws, leaving systems vulnerable until the issue is identified and addressed. Zero-Day attacks can target operating systems, applications, IoT devices, network infrastructure, and even cloud-based services, making them a critical concern in modern cybersecurity.

A Zero-Day vulnerability refers to an undiscovered or unpatched security flaw in a system. This vulnerability may be present in software code, hardware architecture, or network protocols. Attackers continuously search for such flaws, leveraging sophisticated tools and techniques to exploit them. When a Zero-Day vulnerability is identified and exploited by attackers before developers can release a fix, it results in a Zero-Day exploitation. This exploitation allows hackers to gain unauthorized access, execute arbitrary code, steal sensitive data, or disrupt services without detection.

Zero-Day exploits are valuable to cybercriminals, state-sponsored hackers, and Advanced Persistent Threat (APT) groups. Since there are no prior _________ _________ ___ ______ ____ _________ _________ __________ ____ __________ ___ ____.
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