Microsoft Exchange Server vulnerabilities, ransomware lead spring 2021 cyberattack trends

Cisco’s Talos team said 35% of incidents led back to Microsoft Exchange Server vulnerabilities reported early in 2021, but new ransomware families have been appearing to fill the Emotet hole, too.

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Cisco’s Talos Intelligence Group has released its incident response trends report for spring 2021, and found that Microsoft Exchange Server vulnerabilities reported in early 2021 were the most detected incident over the past three months.

Talos said the four Exchange Server vulnerabilities, which now have a patch, comprised 35% of all incident investigations. “When a vulnerability is recently disclosed, severe, and widespread, [we] will often see a corresponding rise in engagements in which the vulnerabilities in question are involved.” 

In addition to widespread Exchange Server attacks,…

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