TransUnion Data Breach: Who’s Affected, What Was Exposed

In a recent cyber incident, hackers were able to gain access to sensitive information on millions of Americans in a data breach targeting TransUnion, one of the nation’s major credit bureaus. The breach, which occurred on July 28, affected over 4.4 million individuals, with stolen information including names, Social Security numbers, and dates of birth.

Legal disclosures filed with the offices of attorneys general in Maine and Texas confirmed the breach, with TransUnion noting that only a small percentage of U.S. consumers were impacted. The credit bureau has engaged third-party cybersecurity experts for an independent forensics review and is working closely with law enforcement to investigate the incident.

TransUnion has taken steps to notify affected customers, with letters being sent out to individuals in Maine beginning this week. The company has clarified that the breach did not involve its core credit database or credit reports, and the incident was identified and contained within hours.

As a precautionary measure, TransUnion is offering two years of free credit monitoring services provided by Cyberscout to those affected by the breach. This comes amidst a string of major breaches in 2025, including the recent hacking of Google’s Gmail accounts by a group known as ShinyHunters.

Individuals who believe they may have been affected by the TransUnion breach can contact the credit bureau directly by calling their fraud assistance line at 1-800-516-4700. Additionally, monitoring credit reports for any unauthorized activity and using online tools like DeHashed or Have I Been Pwned can help identify potential breaches associated with email accounts.

For individuals whose information was leaked, it is important to remain vigilant and monitor financial accounts closely. Taking steps such as deleting old accounts, signing up for credit monitoring, changing passwords, and notifying financial institutions can help mitigate the risk of identity theft. Experts also recommend freezing credit as a preventative measure and utilizing free resources from organizations like the Identity Theft Resource Center and the Federal Trade Commission to screen for potential scams and recover from any identity theft incidents.

Overall, the TransUnion data breach serves as a reminder of the importance of safeguarding personal information and taking proactive measures to protect against identity theft. Stay informed and stay vigilant to ensure the security of your personal data.