Customers of 74 banks and credit unions served by Marquis Software Solutions Third-Party Breach (December 2025)

📅 2025-12-01 🏢 Marquis Software Solutions

Primary Source ↗

Incident Details

In 2025, Customers of 74 banks and credit unions served by Marquis Software Solutions experienced a data security incident via a third-party vendor relationship. The compromised third-party vendor was Marquis Software Solutions. Source reporting: https://www.bleepingcomputer.com/news/security/marquis-data-breach-impacts-over-74-us-banks-credit-unions/

Technical Details

Initial Attack Vector: Compromise of third-party service provider / vendor relationship
Vendor / Product: Marquis Software Solutions
Supply Chain Attack: ✅ Confirmed third-party / vendor compromise

Timeline

2025-12-01 Breach occurred
2025-12-01 Publicly disclosed