Breachesby GlyphAT&T
Disclosed Jul 13, 202373,000,000 affectedConfirmed
Dark web data set covers 73 million current and former AT&T account holders
AT&T said a data set released on the dark web about two weeks earlier contained AT&T data fields from 2019 or earlier, affecting about 7.6 million current and 65.4 million former account holders, including Social Security numbers for some. AT&T reset passcodes for affected current customers; the original source of the data was not determined at disclosure.
What is known
| People affected | 73,000,000 (as reported by the organization) |
|---|---|
| Disclosed | Jul 13, 2023 |
| Discovered | Mar 2024 |
| Attack | Not stated |
| Data exposed | NamesEmailsPhone numbersAddressesDates of birthSocial Security numbersCredentials and tokens |
| Sector | Telecom · US |
| Status | Confirmed |
| Lawsuit or fine | $177M class action settlement covering this and the Snowflake incident (preliminary approval June 2025) |
Sources
AT&T gets preliminary approval for $177 million data breach settlementAT&T Addresses Recent Data Set Released on the Dark WebAT&T confirms data breach and resets millions of customer passcodesVermont Attorney General: 2024-04-09 AT&T Data Breach Notice to ConsumersVermont Attorney General: 2023-07-13 AT&T Data Breach Notice to Consumers
Notices filed
Other breaches at AT&T
Call and text records of nearly all AT&T wireless customers stolen via SnowflakeCredential stuffing exposed names, dates of birth, emails, government IDs, phone numbers, addresses and location data. Reported to the California AG.Credential stuffing110M affectedTelecomUSMar 19, 2024Breach, details not statedExposed names, Social Security numbers and phone numbers. Reported to the California AG.TechUSJun 11, 2014AT&T website flaw leaks email addresses of 114,000 iPad 3G ownersHacking exposed emails and names.Hacking114K affectedTelecomUSUnverifiedJun 9, 2010