More than 4 million people exposed in TransUnion data breach

Msn • November 21, 2025

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According to reporting from Cybernews, the breach did not directly target TransUnion itself but occurred through a third-party vendor on July 28th.

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This article is one source in a clustered incident — the cluster page carries the summary, timeline and every other outlet covering it.

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

Extracted Entities

Attack Types (1)

Companies (1)