DisclosureLens
HackingFinancial ServicesFinanceStolen CredentialsCustomer Data InvolvedCredentialsIdentity (basic)Financial accountLowContained

MUFG Union Bank, National Association

bd_2a4c92a7314b5b1b · schema v1 · pii pii-v1

Severity

Low

Discovered

—

Filed

Dec 11, 2018

To disclose

—

Affected

Not disclosed

Linked

4 filings

Confidence

66%
Full breach record for MUFG Union Bank, National Association →2 incidents on file

MUFG Union Bank, N.A. notified customers that an unauthorized third party used login credentials to access Union Bank Online and/or Mobile Banking accounts between November 9 and November 22, 2018. The compromised credentials were likely obtained from third-party sources, not Union Bank systems. Affected data included User IDs, passwords, names, partial or full bank account numbers, account balances, and transaction information. The bank blocked unauthorized access, reset passwords, and offered 12 months of complimentary credit monitoring.

Incident timeline

Nov 9, 2018

Begins

Dec 11, 2018

Filed

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 · this page
New Hampshire State AG+6d
Massachusetts State AG+7d

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.