HackingFinancial ServicesFinanceCustomer Data InvolvedIdentity (basic)Government IDHighContained

Horne LLP

bd_1b77ccc2d466492a · schema v1 · pii pii-v1

Severity

High

Discovered

Oct 25, 2023

Filed

Dec 26, 2023

To disclose

9 weeks

Affected · nationwide

3,5382 in this filing

Confidence

50%

Full breach record for Horne LLP →3 incidents on file

Financial services firm HORNE LLP reported an external system breach that was discovered on October 25, 2023, but occurred on December 8, 2021. The breach impacted 2 Maine residents, compromising their names and Social Security numbers. The company notified the affected individuals on December 26, 2023, and offered 12 months of complimentary credit monitoring services.

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Maine clockDiscovered Oct 25, 2023 → Filed with AG Dec 26, 202362d ⏱ ME AG >30d9 weeks discovery → filing

⚠ AG web formThe discovery date came from the AG web-form field, which is systematically later than the detection date stated in the letter. Treat the clock as indicative.

Incident timeline

undetected · 686 days

discovery → filing · 9 weeks / 62 days

Dec 8, 2021

Begins

Oct 25, 2023

Discovered

Dec 26, 2023

Filed

vs. sector median

+1 wks slower

Tracked as a single-filing incident — the only disclosure on record for this event so far.Confirmed3,538 affectedView incident

Name: Horne LLP
norm: horne

Name: Horne LLP
norm: horne
Industry: Financial Servicesllm

Discovered: Oct 25, 2023
Breach occurred: Dec 8, 2021
Undetected for: 686 daysoccurrence → discovery
Materiality determined: —
Notification sent: Dec 26, 2023
Affected individuals: 3,538state + nationwide
Data types: Identity (basic)Government ID
Data elements: Social Security number
Attack vector: Unauthorized Access

Changes made: Offered 12 months of complimentary credit monitoring services
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 9 weeks(62 days from discovery to filing)
Compliance flags: ME AG >30d · 62d
Discovery-date grounding: AG web formThe discovery date came from the AG web-form field, which is systematically later than the detection date stated in the letter. Treat the clock as indicative.
Clock breakdown: Statute Window Elapsed Threshold Status
Maine
Discovered: Oct 25, 2023
→ Filed with AG: Dec 26, 2023
62d 30 days (soft) ME AG >30d

Statute	Window	Elapsed	Threshold	Status
Maine	Discovered: Oct 25, 2023 → Filed with AG: Dec 26, 2023	62d	30 days (soft)	ME AG >30d

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.maine.gov/agviewer/content/ag/985235c7-cb95-4be2-8792-a1252b4f8318/52cc55de-0c92-4553-baa0-7316762a245a.shtml
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Dec 26, 2023
Raw hash: c6e2bfbe33795275b7b42a1a60cdb620d187292595cc7d12f142f7ff6019bb95

Reporting entityHorne LLP

Victim entityHorne LLP

Incidentdiscovered Oct 25, 2023

Stated responseOffered 12 months of complimentary credit monitoring services

ComplianceME AG >30d

Extraction provenanceno artifact recorded

Source provenancewww.maine.gov