HackingCustomer Data InvolvedIdentity (basic)Government IDMediumContained

Sullivan Environmental Services

bd_722d92b360b7d6d6 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Jul 28, 2026

Filed

Jul 31, 2026

To disclose

3 days

Affected

7state residents only

Linked

5 filings

Confidence

66%

Full breach record for Sullivan Environmental Services →

Sullivan Environmental Services, Inc. notified Massachusetts residents of a data security event involving unauthorized acquisition of personal information (names). The company detected suspicious activity, investigated, and confirmed the scope on July 28, 2026. No evidence of misuse was found. Notices were sent on July 31, 2026.

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Date basis clock✓ Clock withheld · confirmation date3 days 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 · 3 days

Jul 28, 2026

Discovered

Jul 31, 2026

Filed

This filing is one of 5 filings about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (4) · sorted by filing gap

New Hampshire State AGbd_00582856f774787f2026-07-31Verified
Indiana State AGbd_a1b1761e9f0238f02026-07-31Verified
Nebraska State AGbd_de9755a6376b13392026-07-31Verified
Texas State AGbd_eaa6cc3cf2c1adb12026-08-04 · +4dVerified

Name: Sullivan Environmental Services
norm: sullivan environmental
Domain: sesrvcs.com

Name: Sullivan Environmental Services
norm: sullivan environmental
Domain: sesrvcs.com

Discovered: Jul 28, 2026
Materiality determined: —
Notification sent: Jul 31, 2026
Affected individuals: 7state-resident count only
Data types: Identity (basic)Government ID
Attack vector: Unknown
Threat actor: External

During the incident: Began an investigation to confirm the security of our system and to determine the nature and scope of this event
Engaged cybersecurity specialists to conduct a thorough review of the affected data
Implemented several measures to enhance our security posture and reduce the risk of similar future incidents
Changes made: Implemented several measures to enhance our security posture and reduce the risk of similar future incidents
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 3 days(3 days from discovery to filing)
Compliance flags: Clock withheld · confirmation date

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 5 filings · 5 states

View merged incident ↗

New Hampshire State AGJul 31 · first

Indiana State AGJul 31 · first

Nebraska State AGJul 31 · first

Massachusetts State AGJul 31 · first · this page

Texas State AG+4d

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/2026-1270-sullivan-environmental-services-inc/download
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Jul 31, 2026
Raw hash: 41f0a71d9c50c57bea67c46d9d04153c22cd870fded2c81a3e0fa61de6bc5420

Linked disclosures

Regulatory filings (4) · sorted by filing gap

Reporting entitySullivan Environmental Services

Victim entitySullivan Environmental Services

Incidentdiscovered Jul 28, 2026

Stated responseBegan an investigation to confirm the security of our system and to determine the nature and scope of this event

ComplianceClock withheld · confirmation date

Extraction provenanceno artifact recorded

Source provenancewww.mass.gov