A massive data breach at AT&T resulted in hackers leaking personal information of 86 million customers. The breach, initially posted on a Russian cybercrime forum on May 15, 2025, and re-uploaded on June 3, 2025, involved a dataset believed to be from a stolen AT&T database. The leaked information includes full names, dates of birth, phone numbers, email addresses, physical addresses, and Social Security numbers (SSNs), with 43,989,219 records containing SSNs. The SSNs and dates of birth, originally encrypted, have now been decrypted, significantly escalating the risk of identity theft, financial fraud, and social engineering attacks.
Source: https://cybersecuritynews.com/86-million-att-customer-records-leaked/
TPRM report: https://scoringcyber.rankiteo.com/company/att
"id": "att344060525",
"linkid": "att",
"type": "Breach",
"date": "6/2025",
"severity": "85",
"impact": "4",
"explanation": "Attack with significant impact with customers data leaks"{'affected_entities': [{'customers_affected': '86,017,090',
'industry': 'Telecommunications',
'name': 'AT&T',
'type': 'Telecommunications'}],
'data_breach': {'data_exfiltration': True,
'number_of_records_exposed': '86,017,090',
'personally_identifiable_information': True,
'sensitivity_of_data': 'High',
'type_of_data_compromised': ['Full names',
'Dates of birth',
'Phone numbers',
'Email addresses',
'Physical addresses',
'Social Security numbers '
'(SSNs)']},
'date_detected': '2025-05-15',
'date_publicly_disclosed': '2025-06-03',
'description': 'A massive data breach involving AT&T, with hackers allegedly '
'leaking personal information of 86 million customers.',
'impact': {'data_compromised': ['Full names',
'Dates of birth',
'Phone numbers',
'Email addresses',
'Physical addresses',
'Social Security numbers (SSNs)'],
'identity_theft_risk': 'High'},
'motivation': 'Data Theft',
'references': [{'source': 'AT&T Data Breach'}],
'threat_actor': ['ShinyHunters'],
'title': 'AT&T Data Breach',
'type': 'Data Breach'}