T-Mobile is once again being sued over its 2021 data breach

Washington state is suing T-Mobile for allegedly failing to address cybersecurity vulnerabilities that enabled a hacker to expose the personal data of 79 million people nationwide. The consumer protection lawsuit filed by Washington Attorney General Bob Ferguson on Monday stems from a cyberattack that began in March 2021 and went unnoticed until T-Mobile disclosed the breach in August.

The filing asserts that T-Mobile failed to address certain...