HackingHealthcareTechnologyHealthcareStolen CredentialsSupply Chain (3P Vendor)Customer Data InvolvedIdentity (basic)Government IDHighContained

Rectangle Health

bd_c7f48cbd2ba22cde · schema v1 · pii pii-v1

Severity

High

Discovered

Sep 5, 2025

Filed

Oct 8, 2025

To disclose

5 weeks

Affected · nationwide

2,09511 in this filing

Linked

7 filings

Confidence

65%

Full breach record for Rectangle Health →

Rectangle Health notified the Maine AG of a data breach involving unauthorized access to its Salesforce platform. The incident occurred between August 12-17, 2025, was discovered on September 5, 2025, and affected 2,095 individuals nationwide, including 11 Maine residents. Data exposed included names, SSNs, and DOBs. Notices were sent on October 8, 2025, with credit monitoring offered.

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Maine clockDiscovered Sep 5, 2025 → Filed with AG Oct 8, 202533d ⏱ ME AG >30d5 weeks discovery → filing

⚠ AG web formThe discovery date came from the AG web-form field, which is systematically later than the detection date stated in the letter. Treat the clock as indicative.

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
Montana State AGbd_396a03c05a84425e2025-10-08Candidate
Vermont State AGbd_6ae1999fbf53d01f2025-10-08Verified
Massachusetts State AGbd_8558768083cd9cbd2025-10-08Verified

Show 2 more filings ↓

New Hampshire State AGbd_a237bd270bf207182025-10-08Verified
Nebraska State AGbd_df7e67ac56c2cff32025-10-08Verified

Name: Rectangle Health
norm: rectangle health
Domain: rectanglehealth.com

Name: Rectangle Health
norm: rectangle health
Domain: rectanglehealth.com
Industry: HealthcarellmTechnologyllm

Discovered: Sep 5, 2025
Breach occurred: Aug 12, 2025 – Aug 17, 2025
Undetected for: 24 daysoccurrence → discovery
Materiality determined: —
Notification sent: Oct 8, 2025
Affected individuals: 2,095state + nationwide
Data types: Identity (basic)Government ID
Data elements: Social Security numberDate of birth
Attack vector: Third-Party / Supply Chain
MITRE ATT&CK: T1078 Valid AccountsT1119 Automated Collection
Threat actor: External
Regulator citations: provided written notice of this incident to relevant state regulators
Third party: via Salesforce
Initial access: trusted_relationship

During the incident: Launched an investigation to determine what data may have been impacted
Conducted a comprehensive review of the information potentially affected
Provided access to credit monitoring services for twelve (12) months through Epiq
Providing written notice of this incident to relevant state regulators
Provided written notice of this incident to the three major credit reporting agencies, Equifax, Experian, and TransUnion
Changes made: Evaluate its policies and procedures related to data privacy and security
Assess the security of Rectangle Health systems
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 5 weeks(33 days from discovery to filing)
Compliance flags: ME AG >30d · 33d
Discovery-date grounding: AG web formThe discovery date came from the AG web-form field, which is systematically later than the detection date stated in the letter. Treat the clock as indicative.
Clock breakdown: Statute Window Elapsed Threshold Status
Maine
Discovered: Sep 5, 2025
→ Filed with AG: Oct 8, 2025
33d 30 days (soft) ME AG >30d

Statute	Window	Elapsed	Threshold	Status
Maine	Discovered: Sep 5, 2025 → Filed with AG: Oct 8, 2025	33d	30 days (soft)	ME AG >30d

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 7 filings · 7 states

View merged incident ↗

Indiana State AGOct 8 · first

Montana State AGOct 8 · first

Vermont State AGOct 8 · first

Massachusetts State AGOct 8 · first

New Hampshire State AGOct 8 · first

Nebraska State AGOct 8 · first

Maine 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://www.maine.gov/agviewer/content/ag/985235c7-cb95-4be2-8792-a1252b4f8318/f44b5ae6-03ff-4a9b-9d22-1a44ab3e82bf.html
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: 6285bbdf06d40c7441b7c621d5a54a04b14200c169d4cf1470e51d8ce66dc394

Linked disclosures

Regulatory filings (6) · sorted by filing gap

Reporting entityRectangle Health

Victim entityRectangle Health

Incidentdiscovered Sep 5, 2025

Stated responseLaunched an investigation to determine what data may have been impacted

ComplianceME AG >30d

Extraction provenanceno artifact recorded

Source provenancewww.maine.gov