MemberSource Credit Union data breach

Clerk's notes

MemberSource Credit Union filed a notice with the Montana Attorney General's office on May 5, 2026, regarding a data security incident. This report confirms that the credit union experienced unauthorized access to its systems, which first occurred on June 3, 2025.

While the specific nature of the data involved has not been publicly detailed, MemberSource Credit Union typically handles sensitive personal information for its members. The incident indicates that your data may have been compromised during this unauthorized access. The Montana Attorney General's office is currently investigating this matter.

If you received a data breach notification letter from MemberSource Credit Union, it signifies that your personal information was likely part of the exposure. It is crucial to carefully review this letter, as it should provide details about the incident and any recommendations for protective measures, such as credit monitoring services.

Taking proactive steps is important. Regularly monitor your financial accounts and credit reports for any unusual activity. Be wary of unsolicited communications that might attempt to gain more of your information, as these could be phishing attempts related to the breach.

Understanding the full impact of a data breach can be complex. For individuals affected by the MemberSource Credit Union incident, exploring your options is a reasonable step. We offer a free case review to help assess your situation.

If a notification letter about this breach reached you, see every Montana data breach on file or browse all cases.