Microsoft: These Exchange Server zero-day flaws are being used by hackers, so update now | WHAT REALLY HAPPENED

Microsoft: These Exchange Server zero-day flaws are being used by hackers, so update now

Microsoft has released updates to address four previously unknown or 'zero-day' vulnerabilities in Exchange Server that were being used in limited targeted attacks, according to Microsoft.

Microsoft is urging customers to apply the updates as soon as possible due to the critical rating of the flaws. The flaws affected Exchange Server 2013, Exchange Server 2016, and Exchange Server 2019. Exchange Online is not affected.

"We strongly encourage all Exchange Server customers to apply these updates immediately," it said.

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