New Hampshire Historical Society
ent_7852b4bcae33f3785af8b943
Disclosures
4
State AG · 4 jurisdictions
Incidents
1
filings grouped by incident
Max affected reported
3,125
as filed · State AG VT
Leak-site claims
0
none in sample
Identity resolution
- Canonical name
- New Hampshire Historical Society
- Normalized
- new hampshire historical society— dedupe via name-norm; Microsoft / MSFT collapse to one row
- GLEIF LEI
- No match
- SEC EDGAR CIK
- None — not an SEC registrant
- Domain
- nhhs.org
Disclosure history (4)newest first
- 🍁Vermont State AGas victim2026-04-01
The New Hampshire Historical Society experienced a cybersecurity incident on or about September 5, 2025, involving unauthorized access to its network. The breach compromised personal information of approximately 3,125 individuals, including names, addresses, Social Security numbers, and financial account data. The Society engaged forensic investigators, notified law enforcement, and provided credit monitoring services to affected individuals. The incident is currently contained.
- ⛰️New Hampshire State AGas victim2026-04-01
New Hampshire Historical Society notified the NH Attorney General of a data event discovered on February 13, 2026. Unauthorized access resulted in the copying of names and Social Security numbers for 63 NH residents. The Society engaged forensic investigators and legal counsel, mailed notifications on April 1, 2026, and offered 12 months of credit monitoring via TransUnion/Cyberscout.
- 🏎️Indiana State AGas victim2026-04-01
New Hampshire Historical Society reported a data breach to the Indiana Attorney General. The breach occurred on 2026-02-13 and was reported on 2026-04-01. 1 Indiana residents were affected. 87 individuals affected in total.
- 🦞Maine State AGas victim2026-04-01
The New Hampshire Historical Society, a non-profit organization, reported an external system breach (hacking) to the Maine Attorney General. The incident occurred on 02/13/2026 and was discovered on 03/09/2026. Three Maine residents were affected; the total number of persons affected was not disclosed in the form. Specific data elements compromised were not enumerated in the form. Written notifications to affected Maine residents were sent on 04/01/2026, with 12 months of Cyberscout/TransUnion proactive fraud assistance offered.