Marquis Software breach exposed SSNs and hit Community 1st Credit Union

Community 1st Credit Union disclosed a data breach tied to Marquis Software Solutions, a marketing and customer-engagement vendor that reportedly serves more than 700 banks and credit unions. Reporting indicates the vendor intrusion exposed sensitive customer data held on behalf of financial institutions, with Community 1st identifying affected individuals whose information was compromised through the third-party incident rather than a direct breach of the credit union's own network.

Separate breach reporting says the Marquis incident affected more than 1.3 million people and exposed highly sensitive personal information, including Social Security numbers. The disclosures highlight the scale of third-party concentration risk in the financial sector, where a compromise at a single software provider can cascade across multiple banks and credit unions and trigger customer notifications, breach filings, and potential fraud and identity-theft concerns.