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Microsoft's latest zero-day patch blocks a viral Office document hack - how to protect your PC ASAP

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Elyse Betters Picaro / ZDNET

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ZDNET's key takeaways

Microsoft has released a patch to resolve a security flaw in Office.

The flaw could let a malicious file attachment infect your PC.

Office 2016 and 2019 users must manually update the program.

Microsoft has issued an emergency patch designed to resolve a zero-day security vulnerability affecting several versions of Microsoft Office. Already exploited in the wild, the flaw could allow an attacker to skirt past Office's built-in security measures and send victims a malicious document.

Zero-day vulnerability

In a note published earlier this week, Microsoft revealed details behind the flaw, known as a Microsoft Office Security Feature Bypass Vulnerability.

Also: Why you need Microsoft's new emergency Windows patch - and the black-screen bug to watch for

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