Zero-day attack Computer threats that prey on software weaknesses developers had not identified.

是指电脑被攻击是因为电脑软件上有开发者没有发现的缺陷，从而被黑客利用；

youdao

The malware that led to the hacking of security giant RSA may have been a "zero-day attack" – ie, it had never been seen before – but the method of infection was nothing new.

恶意软件导致安全巨人RSA公司遭到“zero-day attack”攻击（指系统有缺陷，被黑客抓住而发起的攻击）--通过IE，以前没有发生过这种事--但是攻击的技术却是老套。

youdao

At the end of the day, these kinds of systems are primarily designed to protect against the sort of opportunistic smash-and-grab attack that makes up the majority of burglaries.

归根结底，这类系统主要用于防止投机取巧的砸橱窗抢劫袭击，大部分的入室盗窃都属于这类袭击。

youdao

"The U.S.government had sufficient information to have uncovered this plot and to potentially disrupt the Christmas Day attack,"

VOA: standard.2010.01.05

On Saturday,President Obama said an al-Qaida affiliate in Yemen apparently trained and equipped the Nigerian man accused in the failed Christmas Day attack on a Detroit-bound Northwest Airlines flight.

VOA: standard.2010.01.03

Meanwhile,IntelCenter,a U.S.-based terrorism monitoring group that works with the U.S.government, warns the Christmas day attack could be just the start, and that the possibility of additional attempts on U.S.airplanes can not be ruled out.

VOA: standard.2009.12.26

When it first hit, it was a "zero-day attack, " in hacker parlance.

FORBES: Criminal Outbreak

The bottom line is this: The U.S. government had sufficient information to have uncovered this plot and potentially disrupt the Christmas Day attack.

WHITEHOUSE: President Obama Speaks to the Press After Security Meeting

Washington (CNN) -- A Senate committee began its assessment of intelligence reforms put in place after the September 11, 2001, terrorist attacks by focusing Wednesday on the alleged Christmas Day attack aboard a plane landing in Detroit, Michigan.

CNN: Senators hear testimony on alleged Christmas Day bomb plot