TransUnion faces second class action over data breach involving 4.4 million individuals

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TransUnion Data Breach Affects 4.4 Million via Third-Party Vendor TransUnion experienced a data breach on July 28, 2025, affecting approximately 4.4 million individuals. The breach occurred through a third-party vendor rather than directly targeting TransUnion itself, as reported by Cybernews. Plaintiff Howard Herships has initiated a class action lawsuit in response to the incident. 2 sources 43