zero-day

== English == === Alternative forms === zero day, 0-day === Pronunciation === === Adjective === zero-day (not comparable) (computing) Of warez, released less than a day after the official product release. (computer security) Of a vulnerability, newly discovered, and therefore still not fixed and possibly exploited by hackers or other criminals. (computer security) 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. 2005, Valdes et al, Recent Advances in Intrusion Detection Automatically creating reliable signatures of zero-day exploits is the focus of intense research efforts. Used other than figuratively or idiomatically: see zero,‎ day. === Noun === zero-day (plural zero-days) (computer security) A vulnerability that has been discovered recently, and is yet unpatched or unmitigated; a zero-day vulnerability. A day without obligations, where one does not worry about being productive. === References === Hacker Lexicon: What Is a Zero Day? (on Wired.com) 0-day (zero-day) (on About.com) What is a Zero-Day Vulnerability? (on PCTools.com) === Anagrams === zedoary