Last Updated
：2025/11/30
zero day
Noun
alt-of
alternative
Japanese Meaning
コンピュータセキュリティ用語として、未知の脆弱性が発見され、その対策が講じられる前に攻撃に利用される現象（ゼロデイ攻撃、ゼロデイ脆弱性）のことを指す。 / 「zero day」の別表記として用いられるため、意味は同じく未対策の脆弱性やそれを悪用する攻撃を示す。
Sense（1）
（ plural ）
Quizzes for review
(computing) Alternative spelling of zero-day
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zero day
After discovering the zero day, the company released an emergency patch to prevent widespread exploitation.
See correct answer
After discovering the zero day, the company released an emergency patch to prevent widespread exploitation.
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