Fintech firm Marquis alerts dozens of US banks and credit unions of a data breach after ransomware attack
Fintech company Marquis disclosed a ransomware‑driven breach that exposed personal and financial data, including Social Security numbers, of potentially hundreds of thousands of U.S. banking customers. The attack, traced to a compromised third‑party vendor, prompted Marquis to alert dozens of banks and credit unions and highlights the growing threat of double‑extortion ransomware targeting the financial sector.