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The Top Cyber Attacks of November 2021

ID: 923e478d-66f2-59cb-ae73-62c4bc5d7028

STIX ID: report--923e478d-66f2-59cb-ae73-62c4bc5d7028

Feed Name: Arctic Wolf Blog

Threat Score
72/100

Date Published: 2021-12-08

Date Updated: 2026-04-26

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November's cybersecurity roundup details several high-impact incidents: a vishing attack against Robinhood exposing millions of customer PII, a stolen-password compromise at GoDaddy leaking ~1.2M accounts and SSL keys, an FBI email-server hijack via the LEEP portal, and the One Font phishing TTP that evades Microsoft 365 filters—highlighting diverse attacker methods and the need for robust, adaptive security operations.

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