Mainstreet Credit Union Reports Data Incident in Indiana

Mainstreet Credit Union has filed a report with Indiana authorities regarding a data incident that exposed personal information. The credit union stated that the breach event took place on January 12, 2026. Official notification of this incident was subsequently filed with regulators on May 4, 2026.

According to the public record, specific details about the nature of the breach type were not provided. The exact categories of personal information affected in this incident also remain unspecified in the public filing. Mainstreet Credit Union has noted that the incident is currently under investigation.

Individuals who received a notification from Mainstreet Credit Union should carefully review the information provided to understand the potential impact. While details about the compromised data are general, it is prudent to remain vigilant about your personal accounts.

As a general precaution, it is recommended to monitor financial statements and explanations of benefits for any unauthorized transactions or activity. Consider reviewing your credit reports from the three major bureaus for any unfamiliar accounts or inquiries. You can obtain free copies of your credit report annually.

Be alert to any unsolicited communications, especially those requesting personal or account details. Legitimate organizations typically do not ask for sensitive information via unsecure emails or phone calls. Report any suspicious activity directly to Mainstreet Credit Union.