zero-day — English Dictionary

zero-day

Adjective

  1. Of warez, released less than a day after the official product release.

    Usage
    • 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.

  2. Of a vulnerability, newly discovered, and therefore still not fixed and possibly exploited by hackers or other criminals.

    Usage
    • not-comparable
    Examples
    More examples (3)

    Although it's had tons of publicity, the IE zero-day vulnerability is so far only a real threat to people running IE6 on Windows XP, and you have to wonder about the competence of the companies actually affected by it[.]

    Zero-day flaws are a burgeoning commercial field in the underground hacker economy where some gangs work to order for commercial or government clients which want to break into systems.

    The company says Mythos has revealed thousands of so-called zero-day—previously undiscovered—cyber vulnerabilities in every operating system and web browser, some of them up to 27 years old.

  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.

    Usage
    • not-comparable
    Examples

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

    More examples (3)

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

    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.

    Yet again, Adobe’s Flash plugin has been hit by a “zero-day” exploit, meaning that even users with a fully up-to-date installation of the software are vulnerable to attacks.

  4. Used other than figuratively or idiomatically: see zero, day.

    Usage
    • not-comparable
    Examples

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

Noun

  1. A vulnerability that has been discovered recently, and is yet unpatched or unmitigated; a zero-day vulnerability.

    Examples

    New Internet Explorer zero-day exploited in Hong Kong attacks

    More examples (1)

    America’s National Security Agency (NSA) spends upwards of $25m in a year buying previously undisclosed security vulnerabilities – known as zero days, because that’s the length of time the target has had to fix them – but the large investment may not result in as much of a collection of hacking capabilities as is widely assumed.

    Plus: Cisco discloses a zero-day with no available patch, Venezuela accuses the US of a cyberattack, and more.

  2. A day without obligations, where one does not worry about being productive.

    Examples
    More examples (1)

    Whatever you do, do not cut out the “zero days” as suggested in Joel Snape’s article on productivity tips (Big, beautiful goals – but can’t be bothered? 11 great productivity tips for lazy people, 10 July). These are days where you have no obligations, where you do not worry about being productive.

Word forms
zero day0-dayzero-days

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