Social EngineeringHealthcareHealthcarePhishingStolen CredentialsData ExfiltratedCustomer Data InvolvedPIIPHIIdentity (basic)LowContained

Onsite Mammography

bd_a946536717595088 · schema v1 · pii pii-v1

Severity

Low

Discovered

Oct 1, 2024

Filed

Apr 21, 2025

To disclose

29 weeks

Affected

Not disclosed

Linked

8 filings

Confidence

67%

Full breach record for Onsite Mammography →2 incidents on file

Onsite Mammography, LLC notified consumers of a data security incident discovered in October 2024 involving unauthorized access to an employee's email account. The incident exposed patients' names and specific health-related information (PHI). The company engaged independent cybersecurity experts and a data analytics vendor to investigate and assess the scope.

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Vermont clock✗ VT AG >45 bday29 weeks discovery → filing

⚠ unattributedNo provenance was recorded for this discovery date and it matches no other date on the record. It may be correct, but it is not independently grounded.

Incident timeline

discovery → filing · 29 weeks / 202 days

Oct 1, 2024

Discovered

Apr 21, 2025

Filed

vs. sector median

+16 wks slower

This filing is one of 8 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (7) · sorted by filing gap

Massachusetts State AGbd_3d572dffa9d09a382025-04-21Verified
HHS OCRbd_a96b83cee14ef51f2025-04-21Verified
Indiana State AGbd_b49795f765e873bc2025-04-21Verified
Nebraska State AGbd_b920c3058b4d0c0e2025-04-21Verified

Show 3 more filings ↓up to 1d gap

New Hampshire State AGbd_c686ace3fe4924d62025-04-21Verified
Maine State AGbd_c85f887b9fa8986b2025-04-21Verified
South Carolina State AGbd_e2d742e7000ab8362025-04-22 · +1dVerified

Name: Onsite Mammography
norm: onsite mammography

Name: Onsite Mammography
norm: onsite mammography
Industry: Healthcarellm

Discovered: Oct 1, 2024
Materiality determined: —
Notification sent: Apr 21, 2025
Affected individuals: Not disclosed
Data types: PIIPHIIdentity (basic)
Attack vector: Phishing
MITRE ATT&CK: T1566.002 Spearphishing LinkT1078 Valid AccountsT1114 Email Collection
Threat actor: External
Regulator citations: Filed notice with Vermont Attorney General
Initial access: phishing_link

During the incident: Enlisted independent cybersecurity experts to conduct an investigation
Engaged the services of an outside data analytics vendor
Implemented additional security features to reduce the risk of a similar incident occurring in the future
Changes made: Implemented additional security features to reduce the risk of a similar incident occurring in the future
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 29 weeks(202 days from discovery to filing)
Compliance flags: VT AG >45 bday
Discovery-date grounding: unattributedNo provenance was recorded for this discovery date and it matches no other date on the record. It may be correct, but it is not independently grounded.

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 8 filings · 7 states

View merged incident ↗

Massachusetts State AGApr 21 · first

HHS OCRApr 21 · first

Indiana State AGApr 21 · first

Nebraska State AGApr 21 · first

New Hampshire State AGApr 21 · first

Maine State AGApr 21 · first

Vermont State AGApr 21 · first · this page

South Carolina State AG+1d

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/2025-04-21-onsite-mammography-data-breach-notice-consumers
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Apr 21, 2025
Raw hash: 28b79b3a750e3685706dccb47f53134196a7d02aaac018289803170589f513e9

Linked disclosures

Regulatory filings (7) · sorted by filing gap

Reporting entityOnsite Mammography

Victim entityOnsite Mammography

Incidentdiscovered Oct 1, 2024

Stated responseEnlisted independent cybersecurity experts to conduct an investigation

ComplianceVT AG >45 bday

Extraction provenanceno artifact recorded

Source provenanceago.vermont.gov