1st MidAmerica Credit Union Data Breach Exposes Personal Information of Customers
On February 3, 2026, national consumer rights law firm Wolf Haldenstein Adler Freeman & Herz LLP announced an investigation into a data breach affecting customers 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 such as unauthorized account access or identity theft may have had their information exposed.
Wolf Haldenstein, a firm with a history of prosecuting consumer rights cases, is reviewing potential legal claims on behalf of affected customers. The firm operates offices in New York, Chicago, Nashville, and San Diego and has been recognized for its expertise in complex litigation. Individuals seeking further details can contact the firm directly.
The incident underscores ongoing risks to financial institutions and their customers from cyber threats targeting personal data.
1st MidAmerica Credit Union cybersecurity rating report: https://www.rankiteo.com/company/1st-midamerica-credit-union
"id": "1ST1770197462",
"linkid": "1st-midamerica-credit-union",
"type": "Breach",
"date": "12/2024",
"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': 'Breach notifications sent to impacted individuals '
'with warnings about potential identity theft',
'data_breach': {'data_exfiltration': 'Possible circulation on the dark web',
'personally_identifiable_information': 'Yes',
'sensitivity_of_data': 'High',
'type_of_data_compromised': ['Names',
'Social Security numbers']},
'date_detected': '2024-12-01',
'date_publicly_disclosed': '2026-02-03',
'description': 'On February 3, 2026, national consumer rights law firm Wolf '
'Haldenstein Adler Freeman & Herz LLP announced an '
'investigation into a data breach affecting customers 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 such as '
'unauthorized account access or identity theft may have had '
'their information exposed.',
'impact': {'data_compromised': 'Personal information (names, Social Security '
'numbers)',
'identity_theft_risk': 'High'},
'initial_access_broker': {'data_sold_on_dark_web': 'Possible'},
'investigation_status': 'Under investigation',
'references': [{'date_accessed': '2026-02-03',
'source': 'Wolf Haldenstein Adler Freeman & Herz LLP'}],
'regulatory_compliance': {'legal_actions': 'Potential legal claims under '
'review'},
'response': {'communication_strategy': 'Breach notifications sent to impacted '
'individuals',
'third_party_assistance': 'Wolf Haldenstein Adler Freeman & Herz '
'LLP (legal investigation)'},
'title': '1st MidAmerica Credit Union Data Breach Exposes Personal '
'Information of Customers',
'type': 'Data Breach'}