HackingHealthcareHealthcareData ExfiltratedCustomer Data InvolvedIdentity (basic)Government IDPHIHealth (basic)Financial accountMediumContained

Baltimore Medical System, Inc.

bd_0cb31b05431bbf7a · schema v1 · pii pii-v1

Severity

Medium

Discovered

—

Filed

Apr 2, 2026

To disclose

—

Affected

4state residents only

Linked

5 filings

Confidence

68%

Full breach record for Baltimore Medical System, Inc. →

Baltimore Medical System, Inc. notified the Vermont Attorney General of a data breach affecting four Vermont residents. An unauthorized actor accessed and copied files between July 2 and July 20, 2025. Affected data included names, Social Security numbers, medical information, and health insurance information. The company engaged third-party cybersecurity specialists, notified law enforcement, and is providing one year of credit monitoring. Formal written notices were sent to affected Vermont residents on April 2, 2026.

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Leak gap clock✗ Leak >180d

⚠ no discovery dateNo discovery date was extracted, so no notification clock can be evaluated.

Incident timeline

Jul 2, 2025

Begins

Apr 2, 2026

Filed

This filing is one of 5 about the same incident.View merged incident

Linked disclosures

Why this link?

Ransomware claims (2)

Leak Sitebraincipherbd_c2398394790aae682025-09-16 · +197dVerified by operator
Leak Sitebraincipherbd_9f9870480fcc08532025-07-20 · +256dVerified by operator

Regulatory filings (2) · sorted by filing gap

Massachusetts State AGbd_6c660981bba7ec152026-04-02Verified by operator
HHS OCRbd_11c81cf06cb0e1132025-12-12 · +111dVerified by operator

Name: Baltimore Medical System, Inc.
norm: baltimore medical system
Domain: bmsi.org

Name: Baltimore Medical System, Inc.
norm: baltimore medical system
Domain: bmsi.org
Industry: Healthcarellm

Discovered: —
Breach occurred: Jul 2, 2025 – Jul 20, 2025
Materiality determined: —
Notification sent: Apr 2, 2026
Affected individuals: 4state-resident count only
Data types: Identity (basic)Government IDPHIHealth (basic)Financial account
Data elements: Social Security numberMedical information
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid AccountsT1041 Exfiltration Over C2 Channel
Threat actor: External
Regulator citations: Providing written notice of this event to relevant state and federal regulators

During the incident: Launched an investigation with the assistance of third-party cyber security specialists
Notified federal law enforcement
Provided notice of the event to potentially impacted individuals via website postings on September 26, 2025, and December 10, 2025
Providing notified individuals with access to credit monitoring services for one (1) year, through TransUnion, at no cost
Changes made: Reviewing its existing policies and procedures
Implementing additional administrative and technical safeguards as appropriate
Source: Quoted from the filing itself, not independently verified.

Compliance flags: Leak >180d
Discovery-date grounding: no discovery dateNo discovery date was extracted, so no notification clock can be evaluated.

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 3 filings · 2 states

View merged incident ↗

HHS OCRDec 12 · first

Massachusetts State AG+111d

Vermont State AG+111d · this page

Pattern: first filing Dec 12 (MA), last Apr 2 (VT) — a 111-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://ago.vermont.gov/document/2026-04-02-baltimore-medical-system-inc-date-breach-notice-consumers
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Apr 2, 2026
Raw hash: 31ff5ee279392fca480096eeab4a29051a28b1f19ae1d71dc799420a29994f7a

Linked disclosures

Ransomware claims (2)

Regulatory filings (2) · sorted by filing gap

Reporting entityBaltimore Medical System, Inc.

Victim entityBaltimore Medical System, Inc.

IncidentUnauthorized Access

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

ComplianceLeak >180d

Extraction provenanceno artifact recorded

Source provenanceago.vermont.gov