DisclosureLens
HackingFinancial ServicesFinanceStolen CredentialsTargetedIdentity (basic)Government IDPCIMediumContained

MutualOne Bank

bd_4651fa2e7ef8f3d8 · schema v1 · pii pii-v1

Severity

Medium

Discovered

—

Filed

Jun 25, 2026

To disclose

—

Affected

1state residents only

Confidence

68%
Full breach record for MutualOne Bank →438 incidents on file

MutualOne Bank notified Massachusetts residents of fraudulent debit card transactions. The bank credited accounts, issued new cards, and advised customers on fraud alerts and security freezes. No specific data breach or system compromise was disclosed; the incident involved unauthorized use of existing credentials.

Incident timeline — partial

? — ?

Breach window unknown

Jun 25, 2026

Filed

No interval is drawn: no breach start or discovery date is on record for this filing.

Tracked as a single-filing incident — the only disclosure on record for this event so far.Confirmed1 affectedView incident

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.