HackingEducationEducationStolen CredentialsSupply Chain (3P Vendor)Data ExfiltratedCustomer Data InvolvedIdentity (basic)Government IDMediumContained

Orleans Southwest Supervisory Union

bd_08f975227b86e2a8 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Jan 7, 2025

Filed

Mar 12, 2025

To disclose

9 weeks

Affected

Not disclosed

Linked

2 filings

Confidence

66%

Full breach record for Orleans Southwest Supervisory Union →

Orleans Southwest Supervisory Union (OSSU) notified consumers of a data breach involving its third-party vendor, PowerSchool. Between Dec 19-28, 2024, an unknown actor accessed and downloaded personal information, including names and Social Security numbers, from PowerSchool's systems. OSSU's own systems were not impacted. OSSU initiated an investigation, verified the scope, and is offering 24 months of complimentary identity theft protection and credit monitoring through Experian.

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Vermont clock⏱ VT AG >14 bday9 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 · 19 days

discovery → filing · 9 weeks / 64 days

Dec 19, 2024

Begins

Jan 7, 2025

Discovered

Mar 12, 2025

Filed

This filing is one of 2 filings about the same incident.View merged incident

Part of PowerSchool supply-chain incident (2025) — a supply-chain cascade affecting multiple organizations.View cascade →

Linked disclosures

Why this link?

Regulatory filings (1) · sorted by filing gap

Massachusetts State AGbd_3bfe802008a7ada82025-03-12Verified

Name: Orleans Southwest Supervisory Union
norm: orleans southwest supervisory union
Domain: ossu.org

Name: Orleans Southwest Supervisory Union
norm: orleans southwest supervisory union
Domain: ossu.org
Industry: Educationllm

Discovered: Jan 7, 2025
Breach occurred: Dec 19, 2024 – Dec 28, 2024
Undetected for: 19 daysoccurrence → discovery
Materiality determined: —
Notification sent: Mar 12, 2025
Affected individuals: Not disclosed
Data types: Identity (basic)Government ID
Data elements: Social Security number
Attack vector: Third-Party / Supply Chain
MITRE ATT&CK: T1078 Valid AccountsT1041 Exfiltration Over C2 Channel
Threat actor: ExternalFinancial
Initial access: valid_credentials

During the incident: Initiated an investigation
Reviewed the information provided by PowerSchool to identify any individuals whose personal information may have been affected
Worked to independently verify the scope of data involved
Offering identity theft protection services for twenty-four (24) months through Experian at no cost
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 9 weeks(64 days from discovery to filing)
Compliance flags: VT AG >14 bday
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.

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 2 filings · 2 states

View merged incident ↗

Massachusetts State AGMar 12 · first

Vermont State AGMar 12 · 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://ago.vermont.gov/document/2025-03-12-orleans-southwest-supervisory-union-data-breach-notice-consumers
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Mar 12, 2025
Raw hash: 16f2828ef7c3a5ef3b90b9a04cae7fa1f607630e58a50d2a1ab321530f29f1f3

Linked disclosures

Regulatory filings (1) · sorted by filing gap

Reporting entityOrleans Southwest Supervisory Union

Victim entityOrleans Southwest Supervisory Union

Incidentdiscovered Jan 7, 2025

Stated responseInitiated an investigation

ComplianceVT AG >14 bday

Extraction provenanceno artifact recorded

Source provenanceago.vermont.gov