zero-day

Definitions

1. Of warez, released less than a day after the official product release.
   not-comparable
2. Of a vulnerability, newly discovered, and therefore still not fixed and possibly exploited by hackers or other criminals.
   not-comparable
3. Of an exploit or its threat or an attack, benefiting from a newly found and yet unpatched or unmitigated flaw in software or hardware; using a zero-day vulnerability.
   not-comparable
4. Used other than figuratively or idiomatically: see zero, day.
   not-comparable

Examples

“Back then, having "zero day warez" (brand new cracked games that are not even one day old yet) on your BBS first was a big status symbol.”

“If your software is popular and has a high demand⟳, you will want⟳ to defend⟳ against the "zero-day" cracker.”

“Before discussing ways to counter zero-day attacks, let's begin⟳ with the definition of what a zero-day attack is. A zero-day attack is one that the vendor does not yet know⟳ about or hasn't been fixed.”

“2005, Valdes et al, Recent Advances in Intrusion Detection Automatically creating reliable signatures of zero-day exploits is the focus⟳ of intense research⟳ efforts.”

“Average residues of 1.44 and 2.18 mg/kg chlortetracycline were seen in liver and kidney, respectively, at zero-day withdrawal.”

CEFR level