HackingTechnologyInformationStolen CredentialsData ExfiltratedCustomer Data InvolvedIdentity (basic)Government IDHealth (basic)MediumContained

HydroServe LLC

bd_8fbbdf74570d3bbb · schema v1 · pii pii-v1

Severity

Medium

Discovered

Oct 14, 2025

Filed

Dec 19, 2025

To disclose

9 weeks

Affected

41state residents only

Linked

4 filings

Confidence

66%

Full breach record for HydroServe LLC →

HydroServe LLC (dba Gustavo Preston Company) notified the New Hampshire Attorney General on December 19, 2025, of a data event affecting 41 NH residents. Unauthorized access occurred between October 6 and October 14, 2025, involving the viewing or downloading of names, government IDs, SSNs, and medical information. The company provided 12 months of credit monitoring via IDX and implemented additional safeguards.

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Incident timeline

undetected · 8 days

discovery → filing · 9 weeks / 66 days

Oct 6, 2025

Begins

Oct 14, 2025

Discovered

Dec 19, 2025

Filed

vs. sector median

9 wks faster

This filing is one of 4 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (3) · sorted by filing gap

Massachusetts State AGbd_a9f2a30a5acce4ee2025-12-19Verified
Maine State AGbd_c83cf117f752286a2025-12-19Verified
Indiana State AGbd_cad7970b8aa135582025-12-19Candidate

Name: HydroServe LLC
norm: hydroserve

Name: HydroServe LLC
norm: hydroserve
Also named: HydroServe LLCdba oflegal entity
Gustavo Preston Companydba oftrade name
Industry: Technologyllm

Discovered: Oct 14, 2025
Breach occurred: Oct 6, 2025 – Oct 14, 2025
Undetected for: 8 daysoccurrence → discovery
Materiality determined: —
Notification sent: Dec 19, 2025
Affected individuals: 41state-resident count only
Data types: Identity (basic)Government IDHealth (basic)
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid Accounts
Threat actor: External
Regulator citations: Notified New Hampshire Attorney General Consumer Protection & Antitrust Bureau
Initial access: valid_credentials

During the incident: Took steps to secure its systems and launched an investigation
Began a diligent and comprehensive review to identify whose information was contained within the impacted documents
Providing access to credit monitoring services for twelve (12) months, through IDX
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
Changes made: Working to implement additional safeguards and training to its employees
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 9 weeks(66 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 4 filings · 4 states

View merged incident ↗

Massachusetts State AGDec 19 · first

Maine State AGDec 19 · first

Indiana State AGDec 19 · first

New Hampshire State AGDec 19 · 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/hydroserve-20251219.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Dec 19, 2025
Raw hash: 1648fc7ad413fcb5fea06c19c47dd234d4194ed404c6b6303cd3889c5a6d9dbb

Linked disclosures

Regulatory filings (3) · sorted by filing gap

Reporting entityHydroServe LLC

Victim entityHydroServe LLC

Incidentdiscovered Oct 14, 2025

Stated responseTook steps to secure its systems and launched an investigation

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov