zero-day
The origin and history of zero-day.
Etymology
From the count of days the maker of the software has had to fix the flaw, namely zero, because it is already being used against them by the time they learn of it.
The origin and history of zero-day.
From the count of days the maker of the software has had to fix the flaw, namely zero, because it is already being used against them by the time they learn of it.