DisclosureLens
UnknownFinancial accountLow

MUFG Union Bank, National Association

bd_2c20dff790356fd5 · schema v1 · pii pii-v2

Severity

Low

Discovered

—

Filed

Dec 14, 2018

To disclose

—

Affected

1state residents only

Linked

4 filings

Confidence

95%
Full breach record for MUFG Union Bank, National Association →2 incidents on file

MUFG Union Bank, NA reported a data breach to the Massachusetts Office of Consumer Affairs and Business Regulation. The breach was reported on 2018-12-14. 1 Massachusetts residents were affected. The report records the breach type as electronic.

Incident timeline — partial

? — ?

Breach window unknown

Dec 14, 2018

Filed

—

Corroborated · see linked filings

Compliance clocks stay unassessable until a regulatory filing lands. Dashed segments fill in automatically when corroboration arrives.

This filing is one of 4 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (3) · sorted by filing gap

Filing propagation · 4 filings · 4 states

View merged incident ↗
Montana State AGDec 7 · first
California State AG+4d
New Hampshire State AG+6d
Massachusetts State AG+7d · this page

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

Leak-site claim

Attacker assertion only. Establishes: claim date, group, alleged victim.

Press / market report

Unlocks: incident narrative, operational impact. Still no compliance clock.

State AG / regulator filingThis record

Unlocks: discovery date, data types, affected count, compliance clock.

SEC 8-K / victim statement

Unlocks: materiality, stated response, full audit trail. Ceiling removed.