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Thousands of Microsoft Email Servers Exposed Despite Fixes (1)

March 22, 2021, 8:09 PM

Thousands of Microsoft Exchange servers are still compromised by hackers even after applying fixes, a top U.S. cybersecurity official said Monday, citing data from cybersecurity companies.

Brandon Wales, acting director of the Cybersecurity and Infrastructure Security Agency, said owners of the email servers that were compromised before Microsoft Corp. issued a patch nearly three weeks ago must take additional measures to remove the hackers from their networks.

Microsoft has previously warned that patching won’t evict a hacker who has already compromised a server.

“We remain committed to supporting our customers against these attacks, to innovating on our security approach, ...