Cybersecurity

Washington AG Sues T-Mobile Over 2021 Data Breach

T-Mobile responded to the lawsuit in a statement to Broadband Breakfast, expressing surprise at the state’s decision to file the suit.

Jericho Casper

Jan 14, 2025 — 2 min read

Photo of Washington State AG Bob Ferguson by Jerry Cornfield of the Washington State Standard

WASHINGTON, Jan. 14, 2025 – The Office of the Attorney General for Washington State has filed a lawsuit against T-Mobile, accusing the company of negligence in a massive data breach.

The breach, which began in March 2021 and continued until Aug. 12, 2021, exposed sensitive information of over 79 million Americans, including 2 million Washington residents, according to the lawsuit filed in King County Superior Court.

Of those, 183,406 Washington state residents had their Social Security numbers compromised, the attorney general’s office stated in a press release. Other data exposed included phone numbers, names, physical addresses and driver’s license information, among other personal data.

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Cybersecurity Washington state T-Mobile Bob Ferguson King County Superior Court Consumer Protection Act SEC Mina Shahin Kathleen Box Bret Finkelstein Gardner Reed Matt Hehemann Luis Oida Steuart Markley