Central One Federal Credit Union Data Breach: Affects 57k Exposing SSNs

One of the largest federal credit unions in Central Massachusetts, Central One Federal Credit Union, has experienced a data breach. The cybersecurity incident compromised both personally identifiable information (PII) of more than 50,000 current and former credit union customers.

Exposed data included names, Social Security numbers, driver's license or state ID numbers, financial account information and medical and health insurance information. The total number of impacted individuals includes 56,923 Massachusetts residents, 274 in Texas, and 26 in Montana.

The company began disclosing the data breach on Nov. 10, 2025 to the Attorney Generals' offices in Massachusetts, Texas, and Montana.

Central One Federal Credit Union's response

In response to the incident, the credit union took immediate steps to block access and implement steps to enhance data security. Central One Federal Credit Union is notifying affected individuals by mail.

If you receive a notice from Central One Federal Credit Union about this breach, you may want to:

• Sign up for the free Experian IdentityWorks credit monitoring services, offered by the company.
• Monitor your credit reports and financial accounts for any unusual activity.
• Be alert for phishing emails or phone calls that may use your exposed information.
• Consider placing a fraud alert or credit freeze with major credit bureaus.

Central One Federal Credit Union also established a dedicated assistance line for individuals with questions at 855-720-3746 from 9 a.m. to 5 p.m. ET, available Monday through Friday between November 7, 2025, and February 5, 2026.