TransUnion
bd_9d7ad1a3ef9bd9ae · schema v1 · pii pii-v1
Full breach record for TransUnion →13 incidents on fileTransUnion LLC reported a cybersecurity incident involving unauthorized access to a third-party application used for U.S. consumer support operations. The breach occurred on July 28, 2025, and was discovered on July 30, 2025. Approximately 4.46 million individuals were affected, including 16,828 Maine residents. The incident involved limited personal information (names, addresses, etc.) but explicitly excluded credit reports and core credit information. TransUnion provided 24 months of complimentary credit monitoring and fraud assistance.
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Incident timeline
Jul 28, 2025
Begins
Jul 30, 2025
Discovered
Aug 27, 2025
Filed
vs. sector median
4 wks faster
Linked disclosures
Why this link?Regulatory filings (8) · sorted by filing gap
- California State AGbd_217b0e65bf1e48972025-08-27Verified
- Indiana State AGbd_085cfd43425228862025-08-26 · +1dVerified
- Wisconsin State AGbd_b187955d41edb1322025-08-26 · +1dVerified
- Delaware State AGbd_b4d8a6f47a0b6abc2025-08-26 · +1dVerified by operator
Show 4 more filings ↓Show fewer ↑up to 12d gap
- Vermont State AGbd_82d4818cdee39c862025-09-01 · +5dVerified by operator
- Iowa State AGbd_fd85f6604075cd912025-09-02 · +6dVerified by operator
- Montana State AGbd_9bac2141a674997f2025-09-03 · +7dVerified by operator
- Nebraska State AGbd_aaa181287c2471442025-09-08 · +12dVerified by operator
Filing propagation · 9 filings · 9 states
View merged incident ↗Pattern: first filing Aug 26 (IN), last Sep 8 (NE) — a 13-day rolling notification. Rolling spreads often mean counsel is filing as thresholds trip per state. Why this link?
Evidence ladder
Attacker assertion only. Establishes: claim date, group, alleged victim.
Unlocks: incident narrative, operational impact. Still no compliance clock.
Unlocks: discovery date, data types, affected count, compliance clock.
Unlocks: materiality, stated response, full audit trail. Ceiling removed.