HackingHealthcareProfessional ServicesHealthcareVulnerability ExploitSupply Chain (3P Vendor)TargetedHealth (basic)Identity (basic)Financial accountLowContained

Lehigh Valley Health Network

bd_466ff546cdc0a84a · schema v1 · pii pii-v1

Severity

Low

Discovered

Mar 23, 2021

Filed

Jul 29, 2021

To disclose

18 weeks

Affected

1state residents only

Linked

4 filings

Confidence

66%

Guidehouse notified Montana OCP of a breach affecting 1 resident of Lehigh Valley Health Network. Attackers exploited a vulnerability in Accellion FTA on Jan 20, 2021. Guidehouse learned of the campaign on March 23, 2021. Data included medical record numbers, account numbers, and insurance info. Notification sent July 29, 2021.

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Incident timeline

undetected · 62 days

discovery → filing · 18 weeks / 128 days

Jan 20, 2021

Begins

Mar 23, 2021

Discovered

Jul 29, 2021

Filed

vs. sector median

+6 wks slower

This filing is one of 4 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (3) · sorted by filing gap

HHS OCRbd_a1315e93704516aa2021-07-15 · +14dCandidate
Massachusetts State AGbd_0708f8c7afa7fc0a2021-06-28 · +31dVerified
Montana State AGbd_450f31b4b76577de2021-06-25 · +34dCandidate

Name: GUIDEHOUSE INC.
norm: guidehouse

Name: Lehigh Valley Health Network
norm: lehigh valley health network
Industry: HealthcarellmProfessional Servicesllm

Discovered: Mar 23, 2021
Breach occurred: Jan 20, 2021
Undetected for: 62 daysoccurrence → discovery
Materiality determined: —
Notification sent: Jul 29, 2021
Affected individuals: 1state-resident count only
Data types: Health (basic)Identity (basic)Financial account
Attack vector: Third-Party / Supply Chain
MITRE ATT&CK: T1190 Exploit Public-Facing ApplicationT1195 Supply Chain Compromise
Threat actor: External
Regulator citations: Notified Montana Office of Consumer Protection
Third party: via Accellion
Initial access: exploit_public_facing

During the incident: Launched an investigation
Ceased using the third-party service that had been compromised
Cooperated with federal law enforcement
Engaged leading cyber security experts in connection with investigating and responding to the incident
Notified Lehigh Valley Health Network
Providing this individual with an offer for complimentary two year credit monitoring service provided by Experian
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 18 weeks(128 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 4 filings · 3 states

View merged incident ↗

Montana State AGJun 25 · first

Massachusetts State AG+3d

HHS OCR+20d

Montana State AG+34d · this page

Pattern: first filing Jun 25 (MT), last Jul 29 (MT) — a 34-day rolling notification. Rolling spreads often mean counsel is filing as thresholds trip per state. Why this link?

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://dojmt.gov/wp-content/uploads/OCP/a-notif-123.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Jul 29, 2021
Raw hash: b4126156af0e8f5970166535dac45b58b7f169fc1b236b10208cc1021350a15d

Linked disclosures

Regulatory filings (3) · sorted by filing gap

Reporting entityGUIDEHOUSE INC.

Victim entityLehigh Valley Health Network

Incidentdiscovered Mar 23, 2021

Stated responseLaunched an investigation

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov