> A zero-day (also known as 0-day) vulnerability is a computer-software vulnerability that is unknown to, or unaddressed by, those who should be interested in m

> A zero-day (also known as 0-day) vulnerability is a computer-software vulnerability that is unknown to, or unaddressed by, those who should be interested in mitigating the vulnerability (including the vendor of the target software)[0] Why should a publicly known unpatched vulnerability be a lesser concern than something that you don't know exists? [0]https://en.wikipedia.org/wiki/Zero-day_(computing) https://en.wikipedia.org/wiki/Zero-day_(computing)