DisclosureLens
UnknownFinancial accountPCILow

Mutual One Bank

bd_31ea4ada942bf745 · schema v1 · pii pii-v1

Severity

Low

Discovered

—

Filed

Sep 18, 2023

To disclose

—

Affected

1state residents only

Linked

3 filings

Confidence

95%
Full breach record for Mutual One Bank →373 incidents on file

Mutual One Bank reported a data breach to the Massachusetts Office of Consumer Affairs and Business Regulation. The breach was reported on 2023-09-18. 1 Massachusetts residents were affected. The report records the breach type as electronic.

Incident timeline — partial

? — ?

Breach window unknown

Sep 18, 2023

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 3 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (2) · sorted by filing gap

Filing propagation · 3 filings

View merged incident ↗
Massachusetts State AGSep 18 · first
Massachusetts State AGSep 18 · first · this page
Massachusetts State AG+45d

Pattern: first filing Sep 18 (MA), last Nov 2 (MA) — a 45-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.