Did MemberSource Credit Union have a data breach?

In plain terms

MemberSource Credit Union filed a data breach report with the Montana Attorney General in May 2026, confirming unauthorized access to systems on June 3, 2025. This incident may have compromised personal information for individuals who received notification letters, prompting vigilance.

MemberSource Credit Union officially reported a data breach incident to the Montana Attorney General on May 5, 2026. This public filing confirms an unauthorized access event affected the credit union's systems.

The breach reportedly occurred on June 3, 2025. While the specific categories of compromised data were not detailed in the official filing, individuals who received a notification letter should assume their personal information was involved.

The credit union has indicated that the incident is currently under investigation. Details regarding the full scope of the breach and any specific data points affected are subject to this ongoing review.

For those who received a data breach notification from MemberSource Credit Union, it is crucial to review the information provided closely. This letter will outline any specific recommendations or services offered to help protect your data.

General protective steps include closely monitoring all financial accounts and credit reports for any suspicious activity. Consider placing a fraud alert or security freeze on your credit files to prevent unauthorized new accounts from being opened in your name.