Marquis Software Solutions Data Breach Exposes Customer Data of US Banks

Marquis Software Solutions experienced a ransomware attack on August 14, 2025, leading to the exposure of sensitive customer information, including Social Security Numbers and names. The company serves numerous banks and credit unions, and the breach affected member accounts dating back to before 2020. Marquis notified affected institutions, including Community 1st Credit Union, about the incident on October 27, 2025.