1st MidAmerica Credit Union: 1st MidAmerica Credit Union Data Breach Alert Issued By Wolf Haldenstein

1st MidAmerica Credit Union Data Breach Exposes Personal Information of Members

On February 9, 2026, national consumer rights law firm Wolf Haldenstein Adler Freeman & Herz LLP announced an investigation into a data breach affecting members of 1st MidAmerica Credit Union (MACU), based in Bethalto, Illinois. The breach, which occurred in December 2024, may have resulted in the theft of sensitive personal information, including names and Social Security numbers.

MACU has begun notifying impacted individuals, warning that compromised data could be circulating on the dark web. Those who received a breach notification and observed suspicious activity are advised that their information may have been exposed.

Wolf Haldenstein, a firm with a history of handling consumer rights litigation, is reviewing potential legal claims on behalf of affected individuals. The firm operates offices in New York, Chicago, Nashville, and San Diego and has been recognized for its role in complex litigation. Individuals seeking further details can contact the firm directly.

Source: https://www.globenewswire.com/news-release/2026/02/09/3234856/6819/en/1st-MidAmerica-Credit-Union-Data-Breach-Alert-Issued-By-Wolf-Haldenstein.html

1st MidAmerica Credit Union cybersecurity rating report: https://www.rankiteo.com/company/1st-midamerica-credit-union

"id": "1ST1770703532",
"linkid": "1st-midamerica-credit-union",
"type": "Breach",
"date": "2/2026",
"severity": "85",
"impact": "4",
"explanation": "Attack with significant impact with customers data leaks"

{'affected_entities': [{'industry': 'Financial Services',
                        'location': 'Bethalto, Illinois, USA',
                        'name': '1st MidAmerica Credit Union (MACU)',
                        'type': 'Credit Union'}],
 'customer_advisories': 'Affected members notified; advised to monitor for '
                        'suspicious activity',
 'data_breach': {'data_exfiltration': 'Possible circulation on the dark web',
                 'personally_identifiable_information': 'Names, Social '
                                                        'Security numbers',
                 'sensitivity_of_data': 'High (Social Security numbers, names)',
                 'type_of_data_compromised': 'Personal Identifiable '
                                             'Information (PII)'},
 'date_detected': '2024-12',
 'date_publicly_disclosed': '2026-02-09',
 'description': 'A data breach at 1st MidAmerica Credit Union (MACU) in '
                'December 2024 may have resulted in the theft of sensitive '
                'personal information, including names and Social Security '
                'numbers. The breach was publicly disclosed in February 2026, '
                'with notifications sent to affected members. Compromised data '
                'could be circulating on the dark web.',
 'impact': {'data_compromised': 'Personal information, including names and '
                                'Social Security numbers',
            'identity_theft_risk': 'High'},
 'initial_access_broker': {'data_sold_on_dark_web': 'Possible'},
 'investigation_status': 'Under investigation by Wolf Haldenstein',
 'references': [{'date_accessed': '2026-02-09',
                 'source': 'Wolf Haldenstein Adler Freeman & Herz LLP'}],
 'regulatory_compliance': {'legal_actions': 'Potential legal claims under '
                                            'review by Wolf Haldenstein'},
 'response': {'communication_strategy': 'Breach notifications sent to affected '
                                        'members',
              'third_party_assistance': 'Wolf Haldenstein Adler Freeman & Herz '
                                        'LLP (legal investigation)'},
 'title': '1st MidAmerica Credit Union Data Breach Exposes Personal '
          'Information of Members',
 'type': 'Data Breach'}