Social EngineeringHealthcareHealthcarePhishingCustomer Data InvolvedDelayed DiscoveryCredentialsPCIPIILowContained

Bronsky Orthodontics

bd_cf6b05960d057977 · schema v1 · pii pii-v1

Severity

Low

Discovered

Oct 16, 2025

Filed

Jun 29, 2026

To disclose

37 weeks

Affected

1state residents only

Confidence

64%

Full breach record for Bronsky Orthodontics →2 incidents on file

Bronsky Orthodontics notified Massachusetts regulators of a phishing incident affecting employee email accounts. Unauthorized access occurred between August 18 and October 16, 2025. The breach impacted patient information, including names and contact details. One Rhode Island resident was identified. The company engaged cybersecurity specialists, secured the email system, and reported to HHS. No misuse of information was known at the time of notice.

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Massachusetts clock✗ MA AG >90d37 weeks discovery → filing

Incident timeline

undetected · 59 days

discovery → filing · 37 weeks / 256 days

Aug 18, 2025

Begins

Oct 16, 2025

Discovered

Jun 29, 2026

Filed

vs. sector median

+25 wks slower

Tracked as a single-filing incident — the only disclosure on record for this event so far.Confirmed1 affectedView incident

Name: Mark J. Bronsky, DMD, MS, P.C.
norm: mark j bronsky dmd ms

Name: Bronsky Orthodontics
norm: bronsky orthodontics
Also named: Mark J. Bronsky, DMD, MS, P.C.dba oflegal entity
Bronsky Orthodonticsdba oftrade name
Industry: Healthcarellm

Discovered: Oct 16, 2025
Breach occurred: Aug 18, 2025 – Oct 16, 2025
Undetected for: 59 daysoccurrence → discovery
Materiality determined: Jun 29, 2026
Notification sent: —
Affected individuals: 1state-resident count only
Data types: CredentialsPCIPII
Attack vector: Phishing
MITRE ATT&CK: T1566.002 Spearphishing Link
Threat actor: External
Regulator citations: reporting this incident to appropriate regulators, including the U.S. Department of Health and Human Services
Initial access: phishing_link

During the incident: Took steps to secure our email system
Launched an investigation into the activity with the assistance of cybersecurity specialists
Conducted a thorough and time-intensive review of the email accounts
Implemented enhanced security measures
Reporting this incident to appropriate regulators, including the U.S. Department of Health and Human Services
Changes made: Implemented enhanced security measures in order to better safeguard all personal information
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 37 weeks(256 days from discovery to filing)
Compliance flags: MA AG >90d
Discovery-date grounding: letter-groundedThe discovery date is the detection date narrated in the notification letter — the defensible tier.

Status: No extraction artifact recorded for this disclosure.

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.mass.gov/doc/2026-1060-mark-j-bronsky-dmd-ms-pc-dba-bronsky-orthodontics/download
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Jun 29, 2026
Raw hash: c144e80118888d7ca373c6a66edac95845070a70f02ff221eed8cb3e063d4560

Reporting entityMark J. Bronsky, DMD, MS, P.C.

Victim entityBronsky Orthodontics

Incidentdiscovered Oct 16, 2025

Stated responseTook steps to secure our email system

ComplianceMA AG >90d

Extraction provenanceno artifact recorded

Source provenancewww.mass.gov