Attackers have claimed that tens of millions of AT&T’s records, including tax IDs, names, and
IP addresses, were leaked online. However, researchers believe there is insufficient evidence to support this claim.
The alleged AT&T data breach details appeared on a well-known hacker forum. According to the attackers, the dataset contains an impressive 31 million sensitive user records, including full names and customer IP addresses.
The Cybernews research team examined the data sample provided by the attackers. Their analysis shows the sample contains:
- Full customer names
- Genders
- Dates of birth
- Tax IDs
- Device IDs
- Cookie IDs
- IP addresses
- Full addresses
- Phone numbers
- Email addresses
Researchers point out that the sample only contains the full set of details for a single individual. This makes it impossible to verify if the entire database truly holds 31 million records. If each user has the same number of exposed details, it could mean over 3 million AT&T customers had their personal information leaked.
Researchers commented, “If there are actually 31 million lines of this kind of information, it represents a serious breach of user privacy. While we cannot confirm the breach without a proper sample file, the attacker was very active in May, posting tens of times with various types of data.”
If confirmed, this data breach would create significant cybersecurity and privacy risks for those affected. The leaked information provides enough material for financial fraud, account takeovers, and social engineering attacks. The combination of data points allows cybercriminals to impersonate victims, open fraudulent accounts, and bypass security measures.
AT&T is among the world’s largest telecommunications companies, with annual revenue exceeding $122 billion. Its large scale makes it a major target for hackers. For example, in April, AT&T reported that customer data was illegally downloaded from a third-party cloud platform, affecting nearly all customers.
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