HackingOtherData ExfiltratedIdentity (basic)PIILowContained

CHESAPEAKE BAY MARITIME MUSEUM, INC.

bd_ce8cea50b233d3d2 · schema v1 · pii pii-v1

Severity

Low

Discovered

Aug 9, 2024

Filed

Jan 5, 2026

To disclose

17 months

Affected

1state residents only

Linked

6 filings

Confidence

63%

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

Chesapeake Bay Maritime Museum, Inc. notified consumers of a data breach where an unauthorized actor accessed IT systems between Aug 8-9, 2024 and copied files containing names and variable data. The museum offered credit monitoring services. A Vermont AG filing notes at least one Rhode Island resident was impacted.

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 / 514 days

Aug 8, 2024

Begins

Aug 9, 2024

Discovered

Jan 5, 2026

Filed

vs. sector median

+66 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 514 days.View originating leak claim

Linked disclosures

Why this link?

Regulatory filings (5) · sorted by filing gap

Maine State AGbd_17c0f72b065554762026-01-05Verified by operator
Massachusetts State AGbd_aacb680b71728cc02026-01-05Verified
New Hampshire State AGbd_e9629af8d682f7a02026-01-05Verified
Indiana State AGbd_95889a4552aa6e8e2025-12-30 · +6dCandidate

Show 1 more filing ↓up to 6d gap

Vermont State AGbd_bd6122882e7077932025-12-30 · +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 30, 2025
Affected individuals: 1state-resident count only
Data types: Identity (basic)PII
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 to further protect against similar incidents in the future
Offering you 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(514 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

Maine State AG+6d

Massachusetts State AG+6d

New Hampshire State AG+6d

Vermont State AG+6d · this page

Pattern: first filing Dec 30 (IN), last Jan 5 (VT) — 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/2026-01-05-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: Jan 5, 2026
Raw hash: d16907cb3df56b80b03f47cdd680e4d1d0bf034dd61692f54af2f39802e5d32d

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