HackingOtherStolen CredentialsTargetedIdentity (basic)Government IDMediumContained

Horizon House Publications Inc.

bd_79b12c6098a1a86f · schema v1 · pii pii-v1

Severity

Medium

Discovered

Aug 28, 2025

Filed

Oct 15, 2025

To disclose

7 weeks

Affected

2state residents only

Linked

2 filings

Confidence

66%

Full breach record for Horizon House Publications Inc. →

Horizon House Publications, Inc. notified the New Hampshire Attorney General of a data security incident. Unauthorized access occurred between August 27-28, 2025, affecting approximately 2 NH residents. Data included names and Social Security numbers. The company reset passwords, notified law enforcement, and provided credit monitoring services.

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Incident timeline

undetected · 1 days

discovery → filing · 7 weeks / 48 days

Aug 27, 2025

Begins

Aug 28, 2025

Discovered

Oct 15, 2025

Filed

vs. sector median

1 wks faster

This filing is one of 2 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (1) · sorted by filing gap

Massachusetts State AGbd_bb8b74f5e4066cd72025-10-16 · +1dVerified

Name: Horizon House Publications Inc.
norm: horizon house publications
Domain: horizonhouse.com

Name: Horizon House Publications Inc.
norm: horizon house publications
Domain: horizonhouse.com
Industry: Otherllm

Discovered: Aug 28, 2025
Breach occurred: Aug 27, 2025 – Aug 28, 2025
Undetected for: 1 dayoccurrence → discovery
Materiality determined: —
Notification sent: Oct 15, 2025
Affected individuals: 2state-resident count only
Data types: Identity (basic)Government ID
Data elements: Social Security number
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid Accounts
Threat actor: External
Initial access: valid_credentials

During the incident: Reset passwords
Notified law enforcement
Conducted a thorough investigation
Reviewed our policies and procedures related to data protection
Offering of complimentary credit monitoring and identity protection services
Changes made: Reviewed our policies and procedures related to data protection
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 7 weeks(48 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 2 filings · 2 states

View merged incident ↗

New Hampshire State AGOct 15 · first · this page

Massachusetts State AG+1d

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://mm.nh.gov/files/uploads/doj/remote-docs/horizon-house-publications-20251015.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Oct 15, 2025
Raw hash: 30ebcc97afce29bd79e529508ff64f033f1de49cdeb1f69f78c0515f90868ca6

Linked disclosures

Regulatory filings (1) · sorted by filing gap

Reporting entityHorizon House Publications Inc.

Victim entityHorizon House Publications Inc.

Incidentdiscovered Aug 28, 2025

Stated responseReset passwords

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov