What is the definition of a zero-day threat?
What is the definition of a zero-day threat?
A zero-day threat refers to the period between the discovery of a vulnerability and the development and release of a patch to fix that vulnerability. During this time, the vulnerability is known but remains unpatched, leaving systems potentially exposed to exploitation. This means that from the moment the vulnerability is disclosed (day zero), there is no available fix, creating a critical window for potential attacks.
Zero-day threat: The window of vulnerability that exists from the time a new (unknown) threat is released until security vendors release a signature file or security patch for the threat