HackingOtherData ExfiltratedTargetedIdentity (basic)Government IDMediumContained

HydroServe LLC

bd_c83cf117f752286a · schema v1 · pii pii-v1

Severity

Medium

Discovered

Oct 14, 2025

Filed

Dec 19, 2025

To disclose

9 weeks

Affected · nationwide

1381 in this filing

Linked

4 filings

Confidence

65%

Full breach record for HydroServe LLC →

HydroServe LLC dba Gustavo Preston Company reported an external system breach (hacking) occurring between Oct 6 and Oct 14, 2025. Suspicious activity was identified on Oct 14, 2025. An unknown actor accessed systems and viewed/downloaded data, including names and SSNs. 138 individuals were affected (1 in Maine). Written notice was sent on Dec 19, 2025, offering 12 months of credit monitoring via IDX.

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Maine clockDiscovered Oct 14, 2025 → Filed with AG Dec 19, 202566d ⏱ ME AG >30d9 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

undetected · 8 days

discovery → filing · 9 weeks / 66 days

Oct 6, 2025

Begins

Oct 14, 2025

Discovered

Dec 19, 2025

Filed

vs. sector median

+1 wks slower

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

New Hampshire State AGbd_8fbbdf74570d3bbb2025-12-19Verified
Massachusetts State AGbd_a9f2a30a5acce4ee2025-12-19Verified
Indiana State AGbd_cad7970b8aa135582025-12-19Candidate

Name: HydroServe LLC
norm: hydroserve
Domain: gustavopreston.com

Name: HydroServe LLC
norm: hydroserve
Domain: gustavopreston.com
Also named: HydroServe LLCdba oflegal entity
Gustavo Preston Companydba oftrade name
Industry: Otherllm

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: 138state + nationwide
Data types: Identity (basic)Government ID
Attack vector: Unauthorized Access
MITRE ATT&CK: T1190 Exploit Public-Facing ApplicationT1078 Valid Accounts
Threat actor: External
Regulator citations: Providing written notice of this incident to relevant state regulators
Initial access: exploit_public_facing

During the incident: Immediately took steps to secure its systems and launched an investigation
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
Assess and further strengthen the security of our systems and computer environment
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 9 weeks(66 days from discovery to filing)
Compliance flags: ME AG >30d · 66d
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.
Clock breakdown: Statute Window Elapsed Threshold Status
Maine
Discovered: Oct 14, 2025
→ Filed with AG: Dec 19, 2025
66d 30 days (soft) ME AG >30d

Statute	Window	Elapsed	Threshold	Status
Maine	Discovered: Oct 14, 2025 → Filed with AG: Dec 19, 2025	66d	30 days (soft)	ME AG >30d

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 4 filings · 4 states

View merged incident ↗

New Hampshire State AGDec 19 · first

Massachusetts State AGDec 19 · first

Indiana State AGDec 19 · first

Maine 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://www.maine.gov/agviewer/content/ag/985235c7-cb95-4be2-8792-a1252b4f8318/1e92636b-0a09-4df6-be52-bcb8bab04a33.html
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: c6b03a5525f0d79a781625072eada5dc7d4485956128fbb0743518af3ecd829a

Linked disclosures

Regulatory filings (3) · sorted by filing gap

Reporting entityHydroServe LLC

Victim entityHydroServe LLC

Incidentdiscovered Oct 14, 2025

Stated responseImmediately took steps to secure its systems and launched an investigation

ComplianceME AG >30d

Extraction provenanceno artifact recorded

Source provenancewww.maine.gov