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talosblog[email protected] (Martin Lee)TALOSBLOG:AC8ED8970F5692A325A10D93B7F0D965
HistoryMar 08, 2021 - 10:18 a.m.

Threat Advisory: HAFNIUM and Microsoft Exchange zero-day

[email protected] (Martin Lee)

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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