HackingEducationEducationCustomer Data InvolvedData ExfiltratedIdentity (basic)Government IDMediumContained

Kalamazoo Public School District

bd_f5709505866f188c · schema v1 · pii pii-v1

Severity

Medium

Discovered

Apr 30, 2025

Filed

Jul 14, 2025

To disclose

11 weeks

Affected

1state residents only

Linked

7 filings

Confidence

66%

Full breach record for Kalamazoo Public School District →

Kalamazoo Public Schools notified the NH AG of unauthorized network access detected on April 30, 2025. Files were copied by an unauthorized actor. Personal information, including full name and SSN, was impacted for one NH resident. Notification sent July 8, 2025, with 12 months credit monitoring.

J jump to incidentP pin to compareR raw source

Leak gap clock⏱ Leak >30d11 weeks discovery → filing

Incident timeline

discovery → filing · 11 weeks / 75 days

Apr 30, 2025

Discovered

Jun 16, 2025

Scope determined

Jul 14, 2025

Filed

vs. sector median

+2 wks slower

This filing is one of 7 about the same incident.View merged incident

A leak claim by interlock about this victim predates this filing by 79 days.View originating leak claim

Linked disclosures

Why this link?

Ransomware claims (1)

Leak Siteinterlockbd_f567ff1c3033890f2025-04-26 · +79dCandidate

Regulatory filings (5) · sorted by filing gap

Indiana State AGbd_180cbfe964e43c952025-07-08 · +6dVerified
Nebraska State AGbd_4b1ca388bd35c3502025-07-08 · +6dVerified
Maine State AGbd_99ca09d419e04b372025-07-08 · +6dVerified by operator
Massachusetts State AGbd_caa9e0fafef090d02025-07-08 · +6dVerified by operator

Show 1 more filing ↓up to 75d gap

Pressinterlockbd_d7c0b14eff07b85e2025-04-30 · +75dCandidate

Name: Kalamazoo Public School District
norm: kalamazoo public school district
Domain: kalamazoopublicschools.com

Name: Kalamazoo Public School District
norm: kalamazoo public school district
Domain: kalamazoopublicschools.com
Industry: Educationllm

Discovered: Apr 30, 2025
Materiality determined: Jun 16, 2025
Notification sent: Jul 8, 2025
Affected individuals: 1state-resident count only
Data types: Identity (basic)Government ID
Data elements: Social Security number
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid AccountsT1119 Automated Collection
Threat actor: ExternalFinancial
Regulator citations: Notified New Hampshire Attorney General
Initial access: valid_credentials

During the incident: Took immediate steps to securely contain its network
Restore its systems
Launched an immediate investigation in consultation with outside cybersecurity professionals
Changes made: Providing the affected resident with 12 months of complimentary credit monitoring services
Continually evaluates and modifies its practices to enhance the security and privacy of the personal information it maintains
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 11 weeks(75 days from discovery to filing)
Compliance flags: Leak >30d
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.

Filing propagation · 6 filings · 5 states

View merged incident ↗

PressApr 30 · first

Indiana State AG+69d

Nebraska State AG+69d

Maine State AG+69d

Massachusetts State AG+69d

New Hampshire State AG+75d · this page

Pattern: first filing Apr 30, last Jul 14 (NH) — a 75-day rolling notification. Rolling spreads often mean counsel is filing as thresholds trip per state. Why this link?

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/kalamazoo-public-schools-20250714.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Jul 14, 2025
Raw hash: d7b0a7241c5598017ddc8431c54f701e0659825dde678c6eae00326681b2eb34

Linked disclosures

Ransomware claims (1)

Regulatory filings (5) · sorted by filing gap

Reporting entityKalamazoo Public School District

Victim entityKalamazoo Public School District

Incidentdiscovered Apr 30, 2025

Stated responseTook immediate steps to securely contain its network

ComplianceLeak >30d

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov