HackingProfessional ServicesProfessional ServicesCustomer Data InvolvedFinancial accountIdentity (basic)Government IDMediumActive

Horizon Media

bd_611b6f87032f6dba · schema v1 · pii pii-v1

Severity

Medium

Discovered

—

Filed

May 6, 2026

To disclose

—

Affected

67state residents only

Linked

7 filings

Confidence

67%

Full breach record for Horizon Media →

Horizon Media notified Massachusetts residents of a cybersecurity incident involving unauthorized access to personal information. The company engaged federal law enforcement, cooperated with the investigation, and offered 24 months of complimentary credit monitoring and identity restoration services through Experian. The scope of affected individuals was not explicitly quantified in this notice.

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Incident timeline — partial

? — ?

Breach window unknown

May 6, 2026

Filed

—

Corroborated · see linked filings

Compliance clocks stay unassessable until a regulatory filing lands. Dashed segments fill in automatically when corroboration arrives.

This filing is one of 7 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (6) · sorted by filing gap

Vermont State AGbd_21c32db152c9109c2026-05-06Verified
California State AGbd_28d7120ce69782f92026-05-06Verified
Maine State AGbd_33a60a56d229fca92026-05-06Verified
Nebraska State AGbd_681520a53377c51c2026-05-06Verified

Show 2 more filings ↓

Indiana State AGbd_6bb727b2cb7f614b2026-05-06Verified
New Hampshire State AGbd_9b8a4ac6ec45f9a62026-05-06Verified

Name: Horizon Media
norm: horizon media

Name: Horizon Media
norm: horizon media
Industry: Professional Servicesllm

Discovered: —
Materiality determined: —
Notification sent: May 6, 2026
Affected individuals: 67state-resident count only
Data types: Financial accountIdentity (basic)Government ID
Attack vector: Unknown
MITRE ATT&CK: T1114 Email Collection
Threat actor: External

During the incident: Notified federal law enforcement and are cooperating with their investigation
Offering you access to 24 months of credit monitoring services through Experian at no cost to you
Changes made: Assessing our policies, procedures, and infrastructure and are making improvements to our cybersecurity posture to reduce the chances of an event like this recurring
Source: Quoted from the filing itself, not independently verified.

Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 7 filings · 7 states

View merged incident ↗

Vermont State AGMay 6 · first

California State AGMay 6 · first

Maine State AGMay 6 · first

Nebraska State AGMay 6 · first

Indiana State AGMay 6 · first

New Hampshire State AGMay 6 · first

Massachusetts State AGMay 6 · first · this page

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://www.mass.gov/doc/2026-709-horizon-media/download
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: May 6, 2026
Raw hash: 8e31292bc957cf83ea9e24fee3292b2397935b744feef29befcf81cfa6b97b3a

Linked disclosures

Regulatory filings (6) · sorted by filing gap

Reporting entityHorizon Media

Victim entityHorizon Media

IncidentUnknown

Stated responseNotified federal law enforcement and are cooperating with their investigation

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancewww.mass.gov