New regulatory disclosures have confirmed that a cyberattack on financial services vendor Marquis exposed sensitive personal and financial information belonging to more than 400,000 bank and credit union customers across the United States. According to filings submitted to state authorities, attackers accessed Marquis systems by exploiting a known but unpatched firewall vulnerability, allowing unauthorized access […]

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Rebecca Kappel

Source: Security Boulevard
Source Link: https://securityboulevard.com/2025/12/marquis-data-breach-exposes-hundreds-of-thousands-of-bank-customers/