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

In Brief

Marquis, a exertion institution utilized by hundreds of banks to analyse and visualize their customers’ data, says hundreds of thousands of radical had their idiosyncratic and delicate fiscal accusation stolen successful a ransomware onslaught past year.

The Plano, Texas-based fintech institution is notifying astatine slightest 672,075 radical that hackers stole their accusation during the August 2025 cyberattack, according to a listing with Maine’s lawyer general’s office.

More than fractional of each those affected unrecorded successful Texas, according to a abstracted information breach announcement filed in the state.

The disclosure is the fullest representation yet of the fig of radical affected by the breach, which has not been antecedently reported.

The breach allowed hackers to bargain banking customers’ names, dates of birth, and postal addresses. The hackers besides stole customers’ fiscal information, specified arsenic slope accounts, debit, and recognition paper numbers. Marquis said the hackers besides took customers’ Social Security numbers.

The fintech institution sued its firewall provider, SonicWall, successful February, accusing the institution of information failings that allowed hackers to bargain captious accusation astir its firewalls, which hackers past utilized to compromise Marquis’ network, bargain data, and deploy ransomware.

In its lawsuit, Marquis said SonicWall created a vulnerability that allowed hackers to bargain its customers’ firewall configuration backup files, including Marquis’ own.

Marquis did not instantly remark erstwhile contacted by TechCrunch.

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