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Bank software vendor Marquis says more than 670,000 impacted by August breach

Therecord.Media • March 18, 2026

The company, which provides software that allows financial institutions to communicate with customers, previously warned in November that at least 74 banks, credit unions and financial institutions were impacted by a data breach.

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This article is one source in a clustered incident — the cluster page carries the summary, timeline and every other outlet covering it.

Ransomware Attack on Marquis Software Affects Over 670,000 Bank Customers Marquis Software Solutions reported that a ransomware attack last year compromised the personal and financial data of 672,075 individuals. The breach, which affected more than 74 banks, credit unions, and financial institutions, was initially warned about in November 2025. The attack vector and specific vulnerabilities exploited in the breach have not been detailed in the articles. The company provides software that facilitates communication between financial institutions and their customers. The incident highlights the ongoing risks associated with ransomware in the financial sector. As of now, no specific remediation steps or patches have been disclosed. The breach raises concerns about the security measures in place at affected institutions. Customers are advised to monitor their accounts for suspicious activity. 2 sources 62

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Bank software vendor Marquis says more than 670,000 impacted by August breach

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