Social EngineeringEducationEducationPhishingEmployee Data InvolvedGovernment IDIdentity (basic)Financial accountEmploymentMediumContained

Centinela Valley Union High School District

bd_05e3911740758392 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Jan 31, 2019

Filed

Feb 19, 2019

To disclose

19 days

Affected

Not disclosed

Confidence

65%

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

Centinela Valley Union High School District experienced a phishing incident on January 31, 2019, where an employee received a fraudulent email. An unauthorized individual may have obtained W-2 information for employees, including names, addresses, Social Security numbers, and 2018 wage information. The district notified the IRS, state tax boards, and federal law enforcement. Affected employees were offered one year of Experian IdentityWorks identity protection services.

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California clockDiscovered Jan 31, 2019 → Notified Jan 31, 20190d ✓ CA 60-day OK19 days discovery → filing

Incident timeline

undetected · 2 days

discovery → filing · 19 days

Jan 29, 2019

Begins

Jan 31, 2019

Discovered

Feb 19, 2019

Filed

vs. sector median

7 wks faster

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: Jan 31, 2019
Breach occurred: Jan 29, 2019
Undetected for: 2 daysoccurrence → discovery
Materiality determined: —
Notification sent: Jan 31, 2019
Affected individuals: Not disclosed
Data types: Government IDIdentity (basic)Financial accountEmployment
Attack vector: Phishing
MITRE ATT&CK: T1566.002 Spearphishing Link
Threat actor: External
Regulator citations: Notified the IRSNotified state tax boardsNotified federal law enforcement authorities
Initial access: phishing_link

During the incident: Immediately began an investigation to determine the scope of the incident
Notified the IRS, state tax boards, and federal law enforcement authorities
Cooperating with their ongoing investigation
Mailing all affected current and former employees a letter regarding this incident
Offering all affected employees a free one-year membership of Experian’s IdentityWorks
Changes made: Reinforcing our information security training program with an emphasis on the detection and avoidance of phishing email scams
Reviewing our internal procedures related to requests for sensitive information
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 19 days(19 days from discovery to filing)
Compliance flags: CA 60-day OK · 0d
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: Jan 31, 2019
→ Notified: Jan 31, 2019
0d 60 days (analyst band, pre-2026 discoveries) CA 60-day OK

Statute	Window	Elapsed	Threshold	Status
California	Discovered: Jan 31, 2019 → Notified: Jan 31, 2019	0d	60 days (analyst band, pre-2026 discoveries)	CA 60-day OK

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/sb24-144854
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Feb 19, 2019
Raw hash: f7a767e1fa795ef20a6266ec85ddfa1265cfe1cc8e2f1dc2f3a3ace284cc5150

Reporting entityCentinela Valley Union High School District

Victim entityCentinela Valley Union High School District

Incidentdiscovered Jan 31, 2019

Stated responseImmediately began an investigation to determine the scope of the incident

ComplianceCA 60-day OK

Extraction provenanceno artifact recorded

Source provenanceoag.ca.gov