AT&T says hackers stole data from "nearly all" of its cellular customers over several months in 2022 and downloaded it illegally onto a third-party cloud platform.
The Dallas-based telecommunications company announced the massive data breach in a regulatory filing and press release on Friday morning, which said it believes the data is no longer publicly available.
"AT&T has taken additional cybersecurity measures in response to this incident including closing off the point of unlawful access," it added.
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