HackingOtherData ExfiltratedIdentity (basic)OtherLowContained

CHESAPEAKE BAY MARITIME MUSEUM, INC.

bd_bd6122882e707793 · schema v1 · pii pii-v1

Severity

Low

Discovered

Aug 9, 2024

Filed

Dec 30, 2025

To disclose

17 months

Affected

Not disclosed

Linked

6 filings

Confidence

65%

Full breach record for CHESAPEAKE BAY MARITIME MUSEUM, INC. →2 incidents on file

Chesapeake Bay Maritime Museum, Inc. notified consumers of an unauthorized access incident occurring August 8-9, 2024. The museum's IT systems were accessed by an unauthorized actor who copied files containing names and other variable data. The museum secured its environment, investigated, and is offering credit monitoring services to affected individuals.

J jump to incidentP pin to compareR raw source

Vermont clock✗ VT AG >45 bday17 months discovery → filing

⚠ unattributedNo provenance was recorded for this discovery date and it matches no other date on the record. It may be correct, but it is not independently grounded.

Incident timeline

undetected · 1 days

discovery → filing · 17 months / 508 days

Aug 8, 2024

Begins

Aug 9, 2024

Discovered

Dec 30, 2025

Filed

vs. sector median

+65 wks slower

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

A leak claim by helldown about this victim predates this filing by 508 days.View originating leak claim

Linked disclosures

Why this link?

Regulatory filings (5) · sorted by filing gap

Indiana State AGbd_95889a4552aa6e8e2025-12-30Candidate
Maine State AGbd_17c0f72b065554762026-01-05 · +6dVerified by operator
Massachusetts State AGbd_aacb680b71728cc02026-01-05 · +6dVerified
Vermont State AGbd_ce8cea50b233d3d22026-01-05 · +6dVerified

Show 1 more filing ↓up to 6d gap

New Hampshire State AGbd_e9629af8d682f7a02026-01-05 · +6dVerified

Name: CHESAPEAKE BAY MARITIME MUSEUM, INC.
norm: chesapeake bay maritime museum
Domain: cbmm.org

Name: CHESAPEAKE BAY MARITIME MUSEUM, INC.
norm: chesapeake bay maritime museum
Domain: cbmm.org
Industry: Otherllm

Discovered: Aug 9, 2024
Breach occurred: Aug 8, 2024 – Aug 9, 2024
Undetected for: 1 dayoccurrence → discovery
Materiality determined: —
Notification sent: Dec 8, 2025
Affected individuals: Not disclosed
Data types: Identity (basic)Other
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid AccountsT1119 Automated Collection
Threat actor: External

During the incident: Took prompt steps to secure our IT environment
Launched an investigation to determine the nature and scope of the activity
Began a thorough review of the relevant files
Implemented additional security measures
Offering complimentary access to credit monitoring and identity protection services through IDX
Changes made: Implemented additional security measures to further protect against similar incidents in the future
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 17 months(508 days from discovery to filing)
Compliance flags: VT AG >45 bdayLeak >180d
Discovery-date grounding: unattributedNo provenance was recorded for this discovery date and it matches no other date on the record. It may be correct, but it is not independently grounded.

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 6 filings · 5 states

View merged incident ↗

Indiana State AGDec 30 · first

Vermont State AGDec 30 · first · this page

Maine State AG+6d

Massachusetts State AG+6d

Vermont State AG+6d

New Hampshire State AG+6d

Pattern: first filing Dec 30 (IN), last Jan 5 (NH) — a 6-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.

Source URL: https://ago.vermont.gov/document/2025-12-30-chesapeake-bay-maritime-museum-data-breach-notice-consumers
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Dec 30, 2025
Raw hash: aedde58cab9d9a017056af9d2ffb56997661cb8a43a940cd41353b69087d770d

Linked disclosures

Regulatory filings (5) · sorted by filing gap

Reporting entityCHESAPEAKE BAY MARITIME MUSEUM, INC.

Victim entityCHESAPEAKE BAY MARITIME MUSEUM, INC.

Incidentdiscovered Aug 9, 2024

Stated responseTook prompt steps to secure our IT environment

ComplianceVT AG >45 bday

Extraction provenanceno artifact recorded

Source provenanceago.vermont.gov