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CISA Warns of Active Ransomware Attacks Exploiting Critical BeyondTrust and Dell Zero-Day Flaws

CISA Warns of Active Ransomware Attacks Exploiting Critical BeyondTrust and Dell Zero-Day Flaws

February 21, 2026
7 articles (3 new, 4 updated)
21 min read

Summary

This 24-hour period is marked by high-severity alerts from CISA regarding the active exploitation of critical vulnerabilities in BeyondTrust and Dell products for ransomware and espionage campaigns. Major ransomware attacks have crippled Mississippi's largest hospital system (UMMC) and hit Japanese semiconductor giant Advantest. Significant data breaches were also disclosed, including a leak of 1.2 million French bank accounts, a six-month-long exposure at PayPal, and a major theft of PII from educational provider Kaplan. These incidents highlight escalating threats against critical infrastructure, supply chains, and sensitive government databases.

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