Credit First National Association (CFNA) disclosed a data breach involving third-party vendor United Nearshore Operations (UNO). An employee memorized customer debit card numbers, exposing non-CFNA debit card numbers, expiration dates, security codes, names, birthdates, and contact details. No passwords, SSNs, or TINs were involved. CFNA investigated, took disciplinary action, and enhanced security procedures. No fraud was detected.