Zero-day

As has been mentioned, many software-developing companies have rigorous patch management, and therefore they always update their software whenever a vulnerability is discovered. This frustrates hacking efforts targeted at exploiting vulnerabilities that software developers have already patched. As an adaptation to this, hackers have discovered zero-day attacks. Zero-day attacks use advanced vulnerability discovery tools and techniques to identify vulnerabilities that are not yet known by software developers. Some of the commonly used tools and techniques implemented by hackers to find zero-day vulnerabilities are as follows.

Fuzzing

This involves the recreation of a system by the hacker in an attempt to find a vulnerability...