AT&T data leak affects 73 million accounts, cybersecurity investigation

AT&T reported a data leak of 73 million current and former accounts onto the dark web, including sensitive information like Social Security numbers and addresses. Passcodes for 7.6 million current customers were reset. The data, possibly from 2019 or earlier, affected 7.6 million current and 65.4 million former account holders. AT&T is investigating with cybersecurity experts and offering credit monitoring to affected customers. Other major companies like Verizon and T-Mobile have also faced data breaches.