TransUnion confirmed a data breach affecting over 4.4 million people after hackers accessed a third-party application supporting its U.S. consumer operations on July 28. Stolen data includes names, Social Security numbers, and dates of birth, though TransUnion says its core credit database and credit reports were not impacted. The company says it identified and contained the breach within hours, has notified affected individuals via letters, and is offering two years of free credit monitoring through Cyberscout.

This breach adds to a wave of major 2025 cyberattacks, including incidents involving Google, AT&T, and Allianz. Experts recommend affected consumers monitor their credit reports (free weekly at AnnualCreditReport.com), consider freezing their credit to prevent new accounts from being opened fraudulently, change passwords, delete unused accounts, and stay vigilant for suspicious financial activity or phishing attempts.