The California Office of the Attorney General reported a data breach incident involving Discover Financial Services on August 17, 2012. The breach did not involve any Discover card systems and there is no evidence of unauthorized use of the account numbers; however, customers were advised that their account information may have been compromised, leading to the issuance of new cards.
Source: https://oag.ca.gov/ecrime/databreach/reports/sb24-32492
TPRM report: https://www.rankiteo.com/company/discover-financial-services
"id": "dis114072525",
"linkid": "discover-financial-services",
"type": "Breach",
"date": "8/2012",
"severity": "50",
"impact": "2",
"explanation": "Attack limited on finance or reputation"{'affected_entities': [{'industry': 'Finance',
'location': 'California',
'name': 'Discover Financial Services',
'type': 'Financial Services'}],
'customer_advisories': ['Advised customers of potential compromise'],
'data_breach': {'type_of_data_compromised': ['Account Information']},
'date_detected': '2012-08-17',
'date_publicly_disclosed': '2012-08-17',
'description': 'The California Office of the Attorney General reported a data '
'breach incident involving Discover Financial Services on '
'August 17, 2012. The breach did not involve any Discover card '
'systems and there is no evidence of unauthorized use of the '
'account numbers; however, customers were advised that their '
'account information may have been compromised, leading to the '
'issuance of new cards.',
'impact': {'data_compromised': ['Account Information']},
'references': [{'date_accessed': '2012-08-17',
'source': 'California Office of the Attorney General'}],
'response': {'communication_strategy': ['Advised customers of potential '
'compromise'],
'remediation_measures': ['Issuance of new cards']},
'title': 'Data Breach at Discover Financial Services',
'type': 'Data Breach'}