zero-day

Adjective

 * 1)  Of warez: released less than a day after the official product release.
 * 2)  (of a vulnerability) newly discovered, and therefore still not fixed and possibly exploited by hackers or other criminals
 * 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
 * 4) * 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.
 * 1) * 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.
 * Average residues of 1.44 and 2.18 mg/kg chlortetracycline were seen in liver and kidney, respectively, at zero-day withdrawal.

Noun

 * 1)  vulnerability that has been discovered recently, and is yet unpatched or unmitigated; zero-day vulnerability
 * New Internet Explorer zero-day exploited in Hong Kong attacks
 * These days, however, more zero days are being used and discovered.
 * All the four zero-days originally were reported to Microsoft, affecting Internet Explorer on the desktop.