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Inside the Massive Alleged AT&T Data Breach

ID: 720d5650-fc7f-549f-9442-cbe1bbebbfea

STIX ID: report--720d5650-fc7f-549f-9442-cbe1bbebbfea

Feed Name: Troy Hunt – Security Blog

Threat Score
88/100

Date Published: 2024-03-19

Date Updated: 2026-04-19

Author: Troy Hunt

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The blog post describes an alleged massive public dump of ~70–73 million records purportedly containing AT&T-related customer data — including names, addresses, phone numbers and decrypted SSNs/DOBs — verified in part via Have I Been Pwned; AT&T initially denied the breach but later acknowledged dataset fields linked to AT&T while the exact origin (AT&T, a vendor, or third party) remains unconfirmed.

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