Lieff Cabraser is investigating credit reporting agency TransUnion on behalf of users who suffered harm as a result of a major data breach at the company in July 2025

In July of 2025, credit reporting agency TransUnion suffered a major data breach that potentially exposed the data of an estimated 4.4 million consumer users. During the breach, hackers gained access to TransUnion’s database, and compromised users’ highly sensitive personal and financial consumer information, including Social Security numbers and birth dates.

Lieff Cabraser’s nationally-recognized Data Privacy practice group is interested in speaking with TransUnion users affected by the data breach. If you received a notice from TransUnion that your data was exposed and/or are concerned that your data may have been compromised during the data security failure, we urge you to fill out the form on this page to reach out to an experienced data privacy lawyer at Lieff Cabraser today to learn more about your rights and potential recovery. There is no charge or obligation for our review of your case.

Lieff Cabraser’s Cybersecurity and Data Privacy practice group is committed to ensuring that the fundamental right to privacy is respected and maintained as technology evolves to grow ever more powerful, pervasive, and intrusive.

Our Cybersecurity attorneys have the experience and technical expertise necessary to successfully litigate a comprehensive range of privacy claims. We represent individuals in precedent-setting cases against powerful technology, social media, healthcare, and entertainment companies, as we continue to reaffirm and enforce all the privacy protections the law provides to keep secure the most sensitive personal information of citizens in the U.S. and around the world.