MemberSource Credit Union data breach

Clerk's notes

MemberSource Credit Union, located in Montana, has officially filed a data breach notification with relevant regulators. This filing, submitted on May 5, 2026, pertains to an unauthorized access event that initially occurred on June 3, 2025.

The specific method by which the breach occurred and the exact categories of personal information exposed have not been publicly disclosed. However, the acknowledgment of a breach indicates that some form of your data held by MemberSource Credit Union may have been accessed without authorization.

Currently, the incident remains under investigation. This status means that authorities and the credit union are working to understand the full scope and impact of the breach. Additional details may become available as the investigation progresses, but for now, affected individuals should proceed with caution.

If you are a member of MemberSource Credit Union in Montana and receive an official notification letter regarding this incident, it is important to review it carefully. While the specific data types are not known, general protective measures include monitoring your financial statements and credit reports for any suspicious activity. Consider placing a fraud alert on your credit files.

Navigating the aftermath of a data breach can be challenging. If you are concerned about your personal information potentially compromised in the MemberSource Credit Union breach, seeking guidance is a prudent step. A free case review offers an opportunity to discuss your individual circumstances and understand any available recourse, without any obligation.

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