“Zero day” has meant different things over the years, but for the last couple-ish decades it’s meant “the number of days that the vendor has had to fix them” AKA “newly-known”.
It still weirds me out that a term w@r3z d00dz from the 90s coined is now a part of the mainstream IT security lexicon.
It still weirds me out that a term w@r3z d00dz from the 90s coined is now a part of the mainstream IT security lexicon.