Zero Day Definition
A zero day is a vulnerability in a piece of software or an operating system that is unknown to the software vendor or developer. It is called a “zero day” because the vendor has had zero days to address the vulnerability.
Zero days can be exploited by hackers to gain unauthorized access to systems or networks. They can be particularly dangerous because the software vendor or developer is unaware of the vulnerability, which means that there are no patches or updates available to fix it.
Zero days can be discovered by hackers, security researchers, or other parties, and they may be kept secret and used to gain access to systems, or they may be reported to the vendor so that the vulnerability can be fixed. In some cases, zero days are bought and sold on the black market by hackers or other interested parties.
It is important for organizations to be aware of zero days and to take steps to protect their systems and networks against potential zero day attacks. This may include regularly applying security patches and updates, using security software and firewalls, and implementing best practices for security and risk management.
