Marquis says over 672,000 people had personal and financial data stolen in ransomware attack | TechCrunch

"Marquis, a technology company used by hundreds of banks to analyze and visualize their customers' data, says hundreds of thousands of people had their personal and sensitive financial information stolen in a ransomware attack last year. The Plano, Texas-based fintech company is notifying at least 672,075 people that hackers stole their information during the August 2025 cyberattack, according to a listing with Maine's attorney general's office."

"The breach allowed hackers to steal banking customers' names, dates of birth, and postal addresses. The hackers also stole customers' financial information, such as bank accounts, debit, and credit card numbers. Marquis said the hackers also took customers' Social Security numbers."

"The fintech company sued its firewall provider, SonicWall, in February, accusing the company of security failings that allowed hackers to steal critical information about its firewalls, which hackers then used to compromise Marquis' network, steal data, and deploy ransomware. In its lawsuit, Marquis said SonicWall created a vulnerability that allowed hackers to steal its customers' firewall configuration backup files, including Marquis' own."

Marquis, a Texas-based fintech company used by hundreds of banks for data analysis and visualization, disclosed that hackers stole personal and sensitive financial information from at least 672,075 people during an August 2025 ransomware attack. The breach exposed names, dates of birth, postal addresses, bank account numbers, debit and credit card numbers, and Social Security numbers. More than half of affected individuals live in Texas. Marquis subsequently sued its firewall provider, SonicWall, alleging that security vulnerabilities in SonicWall's products allowed hackers to steal firewall configuration backup files, which were then exploited to compromise Marquis' network and deploy ransomware.

Read at TechCrunch