Security TransUnion took days to notice breach affecting 4.5 million And another month to inform the affected consumers. Phillip de Wet Aug 28, 2025 - 2 min read Photo by Claudio Schwarz on Unsplash Get the full story: Subscribe for free Join peers managing over $100 billion in annual IT spend and subscribe to unlock full access to The Stack’s analysis and events. Subscribe now Already a member? Sign in