New Hampshire Historical Society
bd_9b87ba887e50caab · schema v1 · pii pii-v2
Full breach record for New Hampshire Historical Society →New Hampshire Historical Society notified Massachusetts residents of a cybersecurity incident in April 2026. The breach potentially exposed personal information including names, Social Security numbers, and dates of birth. The organization provided 24 months of free credit monitoring and fraud assistance through Cyberscout (a TransUnion company). No specific attack vector or affected count was disclosed.
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Incident timeline — partial
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Breach window unknown
Apr 1, 2026
Filed
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Corroborated · see linked filings
Compliance clocks stay unassessable until a regulatory filing lands. Dashed segments fill in automatically when corroboration arrives.
Linked disclosures
Why this link?Regulatory filings (4) · sorted by filing gap
- Vermont State AGbd_454407f5e00ef36c2026-04-01Candidate
- New Hampshire State AGbd_6a2e16e40b883f092026-04-01Verified
- Indiana State AGbd_a1b8c9ff8dea473f2026-04-01Verified
- Maine State AGbd_f876bba9e20e576f2026-04-01Verified
Filing propagation · 5 filings · 5 states
View merged incident ↗Evidence ladder
Attacker assertion only. Establishes: claim date, group, alleged victim.
Unlocks: incident narrative, operational impact. Still no compliance clock.
Unlocks: discovery date, data types, affected count, compliance clock.
Unlocks: materiality, stated response, full audit trail. Ceiling removed.