Marquis Software Solutions, a marketing and communications vendor for Suncoast Credit Union, reported a ransomware attack in November 2025. The vendor said it detected suspicious activity on its systems on August 14, 2025, and investigated with cybersecurity experts. Suncoast Credit Union’s own systems were not compromised. A report to the Maine Attorney General’s Office said files held by the vendor may have included information received from Suncoast Credit Union.
The information that may have been involved included names, addresses, phone numbers, Social Security numbers, taxpayer identification numbers, financial account information, and dates of birth. The number of Suncoast Credit Union individuals affected has not been disclosed. Notices to affected individuals began in late November 2025; the available information does not state the exact notification date.
The incident details may change as further information becomes available. The reported notice period was late November 2025.