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Did MemberSource Credit Union have a data breach?

Answer

Yes. MemberSource Credit Union reported a data breach to the MT Attorney General on May 5, 2026.

View the official filing

What the filing says

Reported to
MT Attorney General
Filing date
May 5, 2026
Breach date
June 3, 2025
People affected
Not stated in the filing

In plain terms

MemberSource Credit Union has officially reported a data security incident that occurred on June 3, 2025. The credit union filed this public notice on May 5, 2026, confirming an ongoing investigation into the event.

MemberSource Credit Union has confirmed a data security incident, making a public filing about the breach to regulators. This report serves as official notice of a security event involving personal information.

The incident at MemberSource Credit Union was identified to have taken place on June 3, 2025. The credit union submitted its formal report on May 5, 2026, and has indicated that an investigation into the full scope of the breach is currently underway.

Specific details regarding the types of personal information involved in this incident have not been disclosed in the public filing. Similarly, the exact number of individuals whose data may have been compromised remains unspecified as the investigation proceeds.

Individuals who believe they may be affected by this incident, or who receive direct notification, should remain vigilant. It is always a recommended precaution to regularly monitor financial statements and credit reports for any suspicious activity. Additionally, be wary of unsolicited communications, such as emails or calls, that request personal or account details.

This information is based on the official public disclosures filed by MemberSource Credit Union, providing a factual record for individuals seeking to verify reported data breaches.

Other filings by MemberSource Credit Union

Companies often file the same breach in several states. Each filing is listed separately.

Commonly recommended next steps

  • Stay alert to targeted scams

    Be cautious of calls, texts, or emails that reference this breach. Legitimate organizations won't ask you to confirm sensitive details through an unsolicited message.

  • Keep your notification letter

    Save the notice you received. It documents that your information was involved and is often needed to enroll in any credit monitoring offered or to join a related legal claim.

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Other breaches reported in MT

DataBreachSearch.com reports what was filed with state regulators. It is not legal advice, is not a law firm, and is not affiliated with any government agency or with MemberSource Credit Union.