ゼロデイ攻こう撃げき

noun

zero-day attack

A cyberattack that exploits a previously unknown vulnerability, for which no patch exists. Used in IT security contexts.

• そのゼロデイ攻こう撃げきは、多おおくの企き業ぎょうに深しん刻こくな被ひ害がいをもたらした。

  That zero-day attack caused serious damage to many companies.