MalwareEducationEducationRansomwareData EncryptedCustomer Data InvolvedEmployee Data InvolvedIdentity (basic)Government IDFinancial accountHealth (basic)EmploymentMediumContained

Centinela Valley Union High School District

bd_0489d051e1a414dd · schema v1 · pii pii-v1

Severity

Medium

Discovered

Jun 22, 2021

Filed

Oct 21, 2021

To disclose

17 weeks

Affected

Not disclosed

Confidence

65%

Full breach record for Centinela Valley Union High School District →2 incidents on file

On June 22, 2021, Centinela Valley Union High School District experienced a malware incident that encrypted data on computer systems. The district contained the malware and launched an investigation. On July 8, 2021, it was determined that an unauthorized person accessed systems storing data for current and former employees and students, including names, Social Security numbers, financial accounts, health insurance information, and medical information. The district implemented additional security safeguards and offered one year of identity theft protection services.

J jump to incidentP pin to compareR raw source

California clockDiscovered Jun 22, 2021 → Notified Oct 15, 2021115d ✗ CA 60-day late17 weeks discovery → filing

Incident timeline

discovery → filing · 17 weeks / 121 days

Jun 22, 2021

Begins

Jun 22, 2021

Discovered

Oct 21, 2021

Filed

vs. sector median

+7 wks slower

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

Name: Centinela Valley Union High School District
norm: centinela valley union high school district

Name: Centinela Valley Union High School District
norm: centinela valley union high school district
Industry: Educationllm

Discovered: Jun 22, 2021
Breach occurred: Jun 22, 2021
Undetected for: 0 daysoccurrence → discovery
Materiality determined: —
Notification sent: Oct 15, 2021
Affected individuals: Not disclosed
Data types: Identity (basic)Government IDFinancial accountHealth (basic)Employment
Data elements: Social Security number
Attack vector: Unknown
MITRE ATT&CK: T1486 Data Encrypted for ImpactT1078 Valid Accounts
Threat actor: External

During the incident: Identified and contained the malware
Began to restore access to data
Launched an investigation with the assistance of a cybersecurity firm
Implementation of additional security safeguards and controls in our network infrastructure
Offering a complimentary one-year membership in identity theft protection services through IDX
Changes made: Implementation of additional security safeguards and controls in our network infrastructure
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 17 weeks(121 days from discovery to filing)
Compliance flags: CA 60-day late · 115d
Discovery-date grounding: letter-groundedThe discovery date is the detection date narrated in the notification letter — the defensible tier.
Clock breakdown: Statute Window Elapsed Threshold Status
California
Discovered: Jun 22, 2021
→ Notified: Oct 15, 2021
115d 60 days (analyst band, pre-2026 discoveries) CA 60-day late

Statute	Window	Elapsed	Threshold	Status
California	Discovered: Jun 22, 2021 → Notified: Oct 15, 2021	115d	60 days (analyst band, pre-2026 discoveries)	CA 60-day late

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://oag.ca.gov/ecrime/databreach/reports/sb24-546742
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Oct 21, 2021
Raw hash: c21d0e6c83d8444e29badff6d7dbf95bb966f2e3b18da081f3502e7003a26b5a

Reporting entityCentinela Valley Union High School District

Victim entityCentinela Valley Union High School District

Incidentdiscovered Jun 22, 2021

Stated responseIdentified and contained the malware

ComplianceCA 60-day late

Extraction provenanceno artifact recorded

Source provenanceoag.ca.gov