While the vulnerability is still open, attackers can write and implement a code to take advantage of it. However, sometimes hackers or malicious actors spot the vulnerability before the software developers do. Software developers are always looking out for vulnerabilities to "patch" – that is, develop a solution that they release in a new update. Software often has security vulnerabilities that hackers can exploit to cause havoc. What are zero-day attacks and how do zero-day attacks work?
A zero-day exploitis the method hackers use to attack systems with a previously unidentified vulnerability.Because the vendors are unaware, no patch exists for zero-day vulnerabilities, making attacks likely to succeed. A zero-day vulnerability is a software vulnerability discovered by attackers before the vendor has become aware of it.The words vulnerability, exploit, and attack are typically used alongside zero-day, and it’s helpful to understand the difference: A zero-day attack takes place when hackers exploit the flaw before developers have a chance to address it. The term "zero-day" refers to the fact that the vendor or developer has only just learned of the flaw – which means they have “zero days” to fix it. "Zero-day" is a broad term that describes recently discovered security vulnerabilities that hackers can use to attack systems.
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