Mainstreet Credit Union Reports Data Security Incident in Indiana
Mainstreet Credit Union confirmed a data security incident to Indiana regulators, involving unauthorized system access. Individuals who received a notification letter should review it for details on how their personal information may have been affected. This incident was reported in May 2026.
- State
- Indiana
- Breach date
- January 12, 2026
- Reported
- May 4, 2026
Mainstreet Credit Union, which provides banking services in Indiana, reported a data security incident to the state's Attorney General on May 4, 2026. The financial institution confirmed that unauthorized access to its systems occurred on January 12, 2026.
If you received a notification letter from Mainstreet Credit Union, it indicates that your personal information held within their systems may have been compromised. The credit union maintains sensitive personal and financial records for its members.
The purpose of the notification is to inform you about the incident and provide guidance on steps you can take. The company states it is currently investigating the scope and nature of this incident.
As a general precaution, it is advisable to regularly monitor your account statements and credit reports for any unusual or suspicious activity. You can obtain free copies of your credit report annually from each of the three major credit bureaus.
Consider placing a fraud alert or a security freeze on your credit files. These measures can help prevent unauthorized individuals from opening new accounts in your name. Staying vigilant is an important step in protecting your financial identity after a data security event.