Social EngineeringHealthcareHealthcarePhishingCustomer Data InvolvedEmployee Data InvolvedIdentity (basic)Government IDFinancial accountHealth (basic)EmploymentMediumContained

Montana Health Solutions

bd_ef990a131be2b252 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Sep 17, 2024

Filed

Apr 23, 2026

To disclose

—

Affected

735state residents only

Confidence

67%

Full breach record for Montana Health Solutions →2 incidents on file

Montana Health Solutions (MHS) notified the Maryland Attorney General of a data security incident involving 735 Maryland residents. On September 17, 2024, MHS detected unauthorized activity related to an employee email account, likely resulting from a phishing attack. The breach potentially exposed names, Social Security numbers, driver's license information, financial account details, and health/employment data. MHS secured systems, launched an investigation, and provided 12 months of free Experian IdentityWorks services to affected individuals.

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Incident timeline

Sep 17, 2024

Discovered

Apr 23, 2026

Filed

Tracked as a single-filing incident — the only disclosure on record for this event so far.Confirmed735 affectedView incident

Name: Constangy, Brooks, Smith & Prophete, LLP
norm: constangy brooks smith prophete

Name: Montana Health Solutions
norm: montana health
Industry: Healthcarellm

Discovered: Sep 17, 2024
Materiality determined: —
Notification sent: Mar 19, 2025
Affected individuals: 735state-resident count only
Data types: Identity (basic)Government IDFinancial accountHealth (basic)
Attack vector: Phishing
MITRE ATT&CK: T1566.002 Spearphishing Link
Threat actor: ExternalFinancial
Regulator citations: Notified Maryland Attorney General
Initial access: phishing_link

During the incident: Took steps to secure its systems
Launched an investigation
Implemented additional safeguards to enhance the security of its systems
Established a toll-free call center through Epiq
Providing notified individuals with free Experian identity protection services
Changes made: Implemented additional safeguards to enhance the security of its systems
Implemented additional security measures to protect our digital environment
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.

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://oag.maryland.gov/resources-info/SBN%20Documents/2025/ITU-376812.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Apr 23, 2026
Raw hash: a6bad83e90fd4ba2d728d5b0f3a12720f87b67567c0a39489f03688fb2febc72

Reporting entityConstangy, Brooks, Smith & Prophete, LLP

Victim entityMontana Health Solutions

Incidentdiscovered Sep 17, 2024

Stated responseTook steps to secure its systems

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenanceoag.maryland.gov