Author/Source: Zero-day flaw means a security problem that is known to hackers before the software company knows about it. See the full link here
Takeaway
This article discusses how Microsoft released an emergency update to fix a security problem in Microsoft Office. The flaw could allow hackers to take control of computers.
Technical Subject Understandability
Beginner
Analogy/Comparison
Think of this security flaw like leaving your front door unlocked. The update is like locking the door so unwanted people can’t get in.
Why It Matters
This flaw could let hackers access personal information or cause damage to computers. For example, hackers could steal your passwords or delete important files.
Related Terms
Zero-day flaw
Tech Teacher 
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