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Udo Riedel


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Microsoft Exchange disaster - when the patch came, it was already too late

By Udo Riedel on Mar 24, 2021 3:25:02 PM

Bildquelle: iStock

Among a high-profile wave of cyberattacks in March 2021, tens of thousands of email servers worldwide fell victim due to a vulnerability in the Microsoft Exchange Server. Through a so-called zero-day exploit, the vulnerabilities were targeted by a previously unknown Chinese espionage group called "Hafnium.” As a result, national authorities warned thousands of companies to quickly close the gap in their own Exchange servers as Microsoft released patches to fix the vulnerabilities in Exchange servers shortly after.

In this paper, we will clarify the temporal process: What happened? Could the attacks have been prevented?

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