FINTECH FIRM MARQUIS ALERTS DOZENS OF US BANKS AND CREDIT UNIONS OF A DATA BREACH AFTER RANSOMWARE ATTACK

Summary from the TLDR InfoSec newsletter

Marquis, a Texas-based fintech that provides marketing and compliance services to over 700 US banks and credit unions, suffered a ransomware attack on August 14 that exploited a zero-day vulnerability in SonicWall. Attackers stole sensitive customer data, including names, contact details, financial account numbers, and Social Security numbers, impacting at least 400,000 people so far. The total is expected to grow as more state notifications are filed.