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

Rectangle Health

bd_a237bd270bf20718 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Aug 14, 2025

Filed

Oct 8, 2025

To disclose

8 weeks

Affected

10state residents only

Linked

7 filings

Confidence

66%

Full breach record for Rectangle Health →

Rectangle Health notified the New Hampshire AG of a data event affecting 10 NH residents. Unauthorized access to Salesforce customer data occurred Aug 12-17, 2025. Impacted data included names, DOBs, and SSNs. Notification sent Oct 8, 2025. Credit monitoring provided.

J jump to incidentP pin to compareR raw source

Incident timeline

undetected · 2 days

discovery → filing · 8 weeks / 55 days

Aug 12, 2025

Begins

Aug 14, 2025

Discovered

Oct 8, 2025

Filed

vs. sector median

3 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 ↓

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

Name: Mullen Coughlin LLC
norm: mullen coughlin

Name: Rectangle Health
norm: rectangle health
Industry: Healthcarellm

Discovered: Aug 14, 2025
Breach occurred: Aug 12, 2025 – Aug 17, 2025
Undetected for: 2 daysoccurrence → discovery
Materiality determined: —
Notification sent: Oct 8, 2025
Affected individuals: 10state-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 Compromise
Threat actor: External
Regulator citations: Notified New Hampshire Attorney General
Third party: via Salesforce
Initial access: supply_chain

During the incident: Launched an investigation to determine what data may have been impacted
Provided access to credit monitoring services for twelve (12) months through Epiq
Providing impacted individuals with guidance on how to better protect against identity theft and fraud
Providing written notice of this incident to relevant state regulators
Providing written notice of this incident to the three major credit reporting agencies
Changes made: Assess the security of Rectangle Health systems
Evaluate its policies and procedures related to data privacy and security
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 8 weeks(55 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

Montana State AGOct 8 · first

Vermont State AGOct 8 · first

Massachusetts State AGOct 8 · first

Maine State AGOct 8 · first

Nebraska State AGOct 8 · first

New Hampshire 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://mm.nh.gov/files/uploads/doj/remote-docs/rectangle-health-20251008.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: 594190f300c47cacefd28e0e1549c0b8b230a6f6d020cae54870aa4f2df21378

Linked disclosures

Regulatory filings (6) · sorted by filing gap

Reporting entityMullen Coughlin LLC

Victim entityRectangle Health

Incidentdiscovered Aug 14, 2025

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

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov