Published 3 years ago

Microsoft issues emergency patches for 4 exploited 0-days in Exchange

Summary by Ars Technica

Enlarge (credit: Getty Images)Microsoft is urging customers to install emergency patches as soon as possible to protect against highly skilled hackers who are actively exploiting four zero-day vulnerabilities in Exchange Server.The software maker said hackers working on behalf of the Chinese government have been using the previously unknown exploits to hack on-premises Exchange Server software that is fully patched.

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Ars Technica

Microsoft issues emergency patches for 4 exploited 0-days in Exchange

3 years ago·United States

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ZDNet

Update immediately: Microsoft rushes out patches for Exchange Server zero-day attacks

Hafnium state-sponsored threat actor was exploiting four previously unknown flaws in Exchange servers.

3 years ago·United States

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BleepingComputer

Microsoft fixes actively exploited Exchange zero-day bugs, patch now

Microsoft has released emergency out-of-band security updates for Microsoft Exchange that fix four zero-day vulnerabilities actively exploited in targeted attacks.

3 years ago

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microsoft.com

HAFNIUM targeting Exchange Servers with 0-day exploits - Microsoft Security

Microsoft has detected multiple 0-day exploits being used to attack on-premises versions of Microsoft Exchange Server in limited and targeted attacks. In the attacks observed, threat actors used this vulnerability to access on-premises Exchange servers, which enabled access to email accounts, and install additional malware to facilitate long-term access to victim environments. Microsoft Threat Intelligence Center (MSTIC) attributes this campaign…

3 years ago

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