On May 12, 2025, the Maine Attorney General's Office reported a data breach incident involving Arvest Bank that occurred on April 24, 2025. The breach allowed a limited number of customer accounts to be viewable by another customer during online banking, affecting a total of 7,537 individuals, including 4 residents of Maine. Personal information potentially exposed included names, account numbers, balances, and activity. Arvest Bank offered 12 months of identity theft protection services to affected customers.
TPRM report: https://scoringcyber.rankiteo.com/company/arvest-bank
"id": "arv535072625",
"linkid": "arvest-bank",
"type": "Breach",
"date": "4/2025",
"severity": "85",
"impact": "4",
"explanation": "Attack with significant impact with customers data leaks"{'affected_entities': [{'customers_affected': 7537,
'industry': 'Financial Services',
'name': 'Arvest Bank',
'type': 'Bank'}],
'attack_vector': 'Online Banking System',
'customer_advisories': '12 months of identity theft protection services '
'offered to affected customers',
'data_breach': {'number_of_records_exposed': 7537,
'personally_identifiable_information': ['names',
'account numbers',
'balances',
'activity'],
'sensitivity_of_data': 'High',
'type_of_data_compromised': ['names',
'account numbers',
'balances',
'activity']},
'date_detected': '2025-04-24',
'date_publicly_disclosed': '2025-05-12',
'description': 'A data breach incident involving Arvest Bank allowed a '
'limited number of customer accounts to be viewable by another '
'customer during online banking.',
'impact': {'data_compromised': ['names',
'account numbers',
'balances',
'activity'],
'systems_affected': 'Online Banking System'},
'references': [{'date_accessed': '2025-05-12',
'source': "Maine Attorney General's Office"}],
'title': 'Arvest Bank Data Breach',
'type': 'Data Breach'}