HackingTechnologyInformationData ExfiltratedEmployee Data InvolvedIdentity (basic)Government IDMediumActive

HEALTHSTREAM, INC.

bd_8e427c0786aa1770 · schema v1 · pii pii-v2

Severity

Medium

Discovered

Jul 19, 2026

Filed

Sep 14, 2026

To disclose

8 weeks

Affected

5state residents only

Linked

3 filings

Confidence

70%

Full breach record for HEALTHSTREAM, INC. →2 incidents on file

HealthStream, Inc. notified the NH Attorney General of unauthorized access to its internal corporate network between July 16-17, 2026, discovered on July 19, 2026. The incident affected 5 New Hampshire residents, involving exposure of names, Social Security numbers, and potentially driver's license numbers for employees. The investigation is ongoing. HealthStream engaged third-party cybersecurity specialists, notified federal law enforcement, and is offering 12 months of credit monitoring through Epiq.

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Incident timeline

undetected · 3 days

discovery → filing · 8 weeks / 57 days

Jul 16, 2026

Begins

Jul 19, 2026

Discovered

Sep 14, 2026

Filed

vs. sector median

3 wks faster

This filing is one of 3 filings about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (2) · sorted by filing gap

Vermont State AGbd_cd960456565cc2bd2026-09-14Candidate
Indiana State AGbd_d1c43fb196fe23f32026-09-14Verified

Name: HealthStream, Inc.
norm: healthstream

Name: HEALTHSTREAM, INC.
norm: healthstream
Industry: Technologyllm

Discovered: Jul 19, 2026
Breach occurred: Jul 16, 2026 – Jul 17, 2026
Undetected for: 3 daysoccurrence → discovery
Materiality determined: —
Notification sent: Sep 14, 2026
Affected individuals: 5state-resident count only
Data types: Identity (basic)Government ID
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid AccountsT1041 Exfiltration Over C2 Channel
Threat actor: External
Regulator citations: Notified Office of the New Hampshire Attorney GeneralNotified federal law enforcement

During the incident: Launched an investigation with the assistance of third-party cybersecurity specialists
Notified federal law enforcement regarding the event
Providing access to credit monitoring services for twelve (12) months through Epiq
Providing impacted individuals with guidance on how to better protect against identity theft and fraud
Providing written notice of this incident to relevant state regulators
Providing written notice to the three major credit reporting agencies, Equifax, Experian, and TransUnion
Changes made: Working to implement additional safeguards and training to its employees
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 8 weeks(57 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 3 filings · 3 states

View merged incident ↗

Vermont State AGSep 14 · first

Indiana State AGSep 14 · first

New Hampshire State AGSep 14 · 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://mm.nh.gov/files/uploads/doj/remote-docs/healthstream-20260914.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Sep 14, 2026
Raw hash: 4a3c1be9fe3b252ba29070f8d343b50dd55250559c62b2af7325f38532a5e19f

Linked disclosures

Regulatory filings (2) · sorted by filing gap

Reporting entityHealthStream, Inc.

Victim entityHEALTHSTREAM, INC.

Incidentdiscovered Jul 19, 2026

Stated responseLaunched an investigation with the assistance of third-party cybersecurity specialists

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov