When Vendors Become the Vulnerability: What the Marquis Software Breach Signals for Financial Institutions

In December 2025, a ransomware attack on Marquis Software Solutions, a data analytics and marketing vendor serving the financial sector, compromised sensitive customer information held by multiple banks and credit unions, according to Infosecurity Magazine. The attackers reportedly gained access through a known vulnerability in a firewall device connected to Marquis’s remote-access systems. The incident

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