MUFG Union Bank, National Association
bd_63fee85137cfc7c3 · schema v1 · pii pii-v1
All records for MUFG Union Bank, National Association →2 incidents on fileAccount takeover notice
MUFG Union Bank, National Association notified customers of unauthorized access to their accounts. The filing says: “There is no indication that the compromised credentials were obtained through our systems, and we believe the credentials likely were obtained from third-party sources.”
MUFG Union Bank, NA notified Montana residents that an unauthorized third party used stolen login credentials to access Union Bank Online/Mobile Banking accounts in November 2018. Compromised data included credentials, names, partial/full bank account numbers, balances, and transaction info. The bank blocked access, reset passwords, and reported to law enforcement. Affected individuals were offered 12 months of credit monitoring.
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Incident timeline
Nov 1, 2018
Begins
Dec 7, 2018
Filed
Linked disclosures
Why this link?Regulatory filings (3) · sorted by filing gap
- California State AGbd_2a4c92a7314b5b1b2018-12-11 · +4dVerified
- New Hampshire State AGbd_5d92c51a2bb560e82018-12-13 · +6dVerified
- Massachusetts State AGbd_2c20dff790356fd52018-12-14 · +7dVerified
Filing propagation · 4 filings · 4 states
View merged incident ↗Pattern: first filing Dec 7 (MT), last Dec 14 (MA) — a 7-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.