Glossary
Zero-Day Vulnerability
What Is a Zero-Day Vulnerability?
A zero-day vulnerability is a security flaw that is unknown to the vendor or has no available patch — meaning defenders have had zero days to address it before potential exploitation.
Zero-days are particularly dangerous because traditional vulnerability management workflows depend on the existence of a CVE, a published advisory, and an available fix. Detecting weaknesses before they become zero-days requires looking at code patterns and behavior, not lookups against vulnerability databases. NetRise ZeroLens uses AI to identify CWEs and risky patterns in compiled code before they are catalogued as CVEs.