Cyber Incident Victim: 1st MidAmerica Credit Union
Date:
Aug 2025
Location:
United States of America
Summary
1st MidAmerica Credit Union learned that its vendor Marquis Software Solutions detected suspicious activity on its network and determined that an unauthorized third party had gained access and may have acquired files containing customers' personal information such as names and Social Security numbers. The law firm Edelson Lechtzin LLP is investigating potential data privacy claims on behalf of affected individuals regarding this incident.
| CIA Posture | Motives | Tactics, Techniques & Procedures |
|---|---|---|
| Available to members | 0 motives | 1 technique |
| Threat Actors | Type | Location |
|---|---|---|
| 0 actors | Available to members | Available to members |
Description
On or about August 14, 2025, MACU learned of a data breach. Vendor Marquis Software Solutions notified MACU of suspicious activity on its network. Marquis determined that it had experienced a cybersecurity incident. Marquis launched an investigation. The investigation discovered that an unauthorized third party gained access to their network environment. The third party may have accessed and acquired certain files. These files may have contained personal information related to certain MACU customers. The personal information may include names and Social Security numbers.
The compromised data may include names and Social Security numbers of certain MACU customers. The breach prompted MACU to be notified by its vendor. The incident led to a legal response. Edelson Lechtzin LLP is investigating data privacy claims on behalf of affected customers. The law firm is pursuing a class action lawsuit to seek legal remedies for individuals whose sensitive personal data may have been compromised.
Marquis Software Solutions conducted an investigation after detecting suspicious activity. MACU was informed of the breach on or about August 14, 2025. The law firm's investigation aims to address the data privacy claims. No further details about containment or mitigation are provided in the source.