Threat Advisory: HAFNIUM and Microsoft Exchange zero-day
Microsoft released patches for four vulnerabilities in Exchange Server on March 2, disclosing that these vulnerabilities were being exploited by a previously unknown threat actor, referred to as HAFNIUM.
The vulnerabilities in question — CVE-2021-26855, CVE-2021-26857, CVE-2021-26858 and CVE-2021-27065 — affect Microsoft Exchange Server 2019, 2016, 2013 and the out-of-support Microsoft Exchange Server 2010. The patches for these vulnerabilities should be applied as soon as possible. Microsoft…

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