HackingEducationEducationStolen CredentialsCustomer Data InvolvedEmployee Data InvolvedPIIIdentity (basic)LowActive

Cassia County Joint School District No. 151

bd_dd52d8c013b2fcbf · schema v1 · pii pii-v1

Severity

Low

Discovered

May 2, 2026

Filed

May 11, 2026

To disclose

9 days

Affected

Not disclosed

Confidence

67%

Full breach record for Cassia County Joint School District No. 151 →2 incidents on file

Cassia Joint School District #151 notified the Idaho AG of a cybersecurity incident involving its LMS provider, Instructure (Canvas). On May 2, 2026, Instructure reported unauthorized access to user data including names, emails, student IDs, and messages. No passwords, DOBs, or financial data were compromised. Instructure engaged forensics and law enforcement; the District is notifying stakeholders and auditing access controls.

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Incident timeline

discovery → filing · 9 days

May 2, 2026

Discovered

May 11, 2026

Filed

vs. sector median

9 wks faster

Part of Instructure, Inc. supply-chain incident (2026) — a supply-chain cascade affecting multiple organizations.View cascade →

Tracked as a single-filing incident — the only disclosure on record for this event so far.ConfirmedView incident

Name: Cassia County Joint School District No. 151
norm: cassia county joint school district no 151
Domain: cassiaschools.org

Name: Cassia County Joint School District No. 151
norm: cassia county joint school district no 151
Domain: cassiaschools.org
Industry: Educationllm

Discovered: May 2, 2026
Materiality determined: —
Notification sent: —
Affected individuals: Not disclosed
Data types: PIIIdentity (basic)
Attack vector: Third-Party / Supply Chain
MITRE ATT&CK: T1078 Valid Accounts
Threat actor: External
Regulator citations: Notifying the Executive Director of the Idaho State Board of Education and the State Superintendent of Public Instruction
Third party: via Instructure
Initial access: valid_credentials

During the incident: Working closely with Instructure to verify the full extent of the impact on our student and staff Personally Identifiable Information (PII)
Notify parents, guardians, and staff regarding the incident, providing them with guidance on monitoring for phishing attempts and general credential security
Notifying the Executive Director of the Idaho State Board of Education and the State Superintendent of Public Instruction
Auditing administrative role assignments
Changes made: Technology Department has Multi-Factor Authentication (MFA) on privileged accounts
Auditing administrative role assignments
Following all protocols provided by the vendor
Source: Quoted from the filing itself, not independently verified.

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

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.ag.idaho.gov/content/uploads/2026/05/2026.05.02-Cassia-School-Dist.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: May 11, 2026
Raw hash: 1667f30c555dd2bd6abe1bfb970924870fe49405a10585fde513a87cc47484c0

Reporting entityCassia County Joint School District No. 151

Victim entityCassia County Joint School District No. 151

Incidentdiscovered May 2, 2026

Stated responseWorking closely with Instructure to verify the full extent of the impact on our student and staff Personally Identifiable Information (PII)

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancewww.ag.idaho.gov