HackingHealthcareHealthcareStolen CredentialsSupply Chain (3P Vendor)Customer Data InvolvedIdentity (basic)Government IDMediumContained

Rectangle Health

bd_396a03c05a84425e · schema v1 · pii pii-v1

Severity

Medium

Discovered

Sep 5, 2025

Filed

Oct 8, 2025

To disclose

5 weeks

Affected

8state residents only

Linked

7 filings

Confidence

63%

Full breach record for Rectangle Health →

Rectangle Health notified Montana residents of unauthorized access to its Salesforce customer data platform between August 12-17, 2025. The incident impacted names, SSNs, and dates of birth. Rectangle Health discovered the breach on September 5, 2025, and is offering credit monitoring services to affected individuals.

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Incident timeline

undetected · 24 days

discovery → filing · 5 weeks / 33 days

Aug 12, 2025

Begins

Sep 5, 2025

Discovered

Oct 8, 2025

Filed

vs. sector median

6 wks faster

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

Indiana State AGbd_37b9232200ff883b2025-10-08Verified
Vermont State AGbd_6ae1999fbf53d01f2025-10-08Verified
Massachusetts State AGbd_8558768083cd9cbd2025-10-08Verified
New Hampshire State AGbd_a237bd270bf207182025-10-08Verified

Show 2 more filings ↓

Maine State AGbd_c7f48cbd2ba22cde2025-10-08Verified
Nebraska State AGbd_df7e67ac56c2cff32025-10-08Verified

Name: Rectangle Health
norm: rectangle health

Name: Rectangle Health
norm: rectangle health
Industry: Healthcarellm

Discovered: Sep 5, 2025
Breach occurred: Aug 12, 2025 – Aug 17, 2025
Undetected for: 24 daysoccurrence → discovery
Materiality determined: —
Notification sent: —
Affected individuals: 8state-resident count only
Data types: Identity (basic)Government ID
Data elements: Social Security numberDate of birth
Attack vector: Third-Party / Supply Chain
MITRE ATT&CK: T1195 Supply Chain CompromiseT1078 Valid Accounts
Threat actor: External
Third party: via Salesforce
Initial access: supply_chain

During the incident: Conducted a diligent investigation to confirm the full nature and scope
Took prompt steps to ensure security of its network environment
Conducted a comprehensive review of the information potentially affected
Continues to evaluate its policies and procedures related to data privacy and security
Providing you with access to credit monitoring services for <<CM Duration>> months through Epiq at no cost to you
Changes made: Continues to evaluate its policies and procedures related to data privacy and security
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 5 weeks(33 days from discovery to filing)
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 ↗

Indiana State AGOct 8 · first

Vermont State AGOct 8 · first

Massachusetts State AGOct 8 · first

New Hampshire State AGOct 8 · first

Maine State AGOct 8 · first

Nebraska State AGOct 8 · first

Montana State AGOct 8 · 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://dojmt.gov/wp-content/uploads/2025/10/Consumer-notification-letter-19.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Oct 8, 2025
Raw hash: 30368612abe1cc69afcc1b1f0529a61309eaa89244b2c90cefb2b0c315e0555f

Linked disclosures

Regulatory filings (6) · sorted by filing gap

Reporting entityRectangle Health

Victim entityRectangle Health

Incidentdiscovered Sep 5, 2025

Stated responseConducted a diligent investigation to confirm the full nature and scope

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov