DisclosureLens
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The Middlefield Banking Company

bd_c1b3763023b7f8a7 · schema v1 · pii pii-v1

Severity

Medium

Discovered

—

Filed

Dec 21, 2023

To disclose

—

Affected

223state residents only

Linked

6 filings

Confidence

95%
Full breach record for The Middlefield Banking Company →2 incidents on file

the Middlefield Banking Company reported a data breach to the Massachusetts Office of Consumer Affairs and Business Regulation. The breach was reported on 2023-12-21. 223 Massachusetts residents were affected. The report records the breach type as electronic.

Massachusetts clock✓ MA credit monitoring due
⚠ no discovery dateNo discovery date was extracted, so no notification clock can be evaluated.

Incident timeline — partial

? — ?

Breach window unknown

Dec 21, 2023

Filed

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

This filing is one of 6 filings about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (5) · sorted by filing gap

Show 1 more filing ↓

Filing propagation · 6 filings · 5 states

View merged incident ↗
Vermont State AGDec 21 · first
Montana State AGDec 21 · first
New Hampshire State AGDec 21 · first
California State AGDec 21 · first
SEC 8-KDec 21 · first
Massachusetts State AGDec 21 · first · this page

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.