TransUnion
bd_b187955d41edb132 · schema v1 · pii pii-v1
Full breach record for TransUnion →11 incidents on fileTransUnion LLC reported a data breach to the Wisconsin DATCP. The public was notified on 2025-08-26. The incident occurred on July 28, 2025. Data accessed: Social Security numbers and dates of birth. 4,461,511 individuals were affected. 69,256 Wisconsin residents were affected.
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Incident timeline
Jul 28, 2025
Begins
Aug 26, 2025
Filed
Linked disclosures
Why this link?Regulatory filings (10) · sorted by filing gap
- California State AGbd_217b0e65bf1e48972025-08-27 · +1dVerified by operator
- Vermont State AGbd_82d4818cdee39c862025-09-01 · +6dVerified by operator
- Oregon State AGbd_5b59f10c6f6c553f2025-09-02 · +7dVerified
- Iowa State AGbd_fd85f6604075cd912025-09-02 · +7dVerified by operator
Show 6 more filings ↓Show fewer ↑up to 13d gap
- Montana State AGbd_9bac2141a674997f2025-09-03 · +8dVerified by operator
- New Hampshire State AGbd_331561e568edbb3f2025-09-04 · +9dVerified by operator
- Texas State AGbd_83b605646965217d2025-09-04 · +9dVerified by operator
- South Carolina State AGbd_d7d141dc595dd1b02025-09-04 · +9dVerified by operator
- Massachusetts State AGbd_d87eb450bda408862025-09-04 · +9dVerified by operator
- Nebraska State AGbd_aaa181287c2471442025-09-08 · +13dVerified by operator
Showing first 10 of 14 linked disclosures.
Filing propagation · 11 filings · 11 states
View merged incident ↗Pattern: first filing Aug 26 (WI), last Sep 8 (NE) — a 13-day rolling notification. Rolling spreads often mean counsel is filing as thresholds trip per state. Why this link?
Cascade drawn from the first 10 linked disclosures of 14 — the full spread may be wider.
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.