HackingEducationEducationStolen CredentialsCustomer Data InvolvedEmployee Data InvolvedHealth (basic)Identity (basic)Government IDPHIMediumContained

Bellevue School District No. 405

bd_83f085762d622986 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Apr 26, 2022

Filed

Oct 10, 2022

To disclose

24 weeks

Affected

573state residents only

Confidence

71%

Full breach record for Bellevue School District No. 405 →

Bellevue School District No. 405 notified the WA AG of a data security incident where students inadvertently accessed an administrative folder. Unauthorized access occurred March 30-April 25, 2022. 573 WA residents affected. Data included names, addresses, medical info, and SSNs. District engaged forensic firm, secured network, and offered 12 months of Kroll identity monitoring.

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Washington clock✗ WA AG >90d24 weeks discovery → filing

⚠ AG web formThe discovery date came from the AG web-form field, which is systematically later than the detection date stated in the letter. Treat the clock as indicative.

Incident timeline

undetected · 27 days

discovery → filing · 24 weeks / 167 days

Mar 30, 2022

Begins

Apr 26, 2022

Discovered

Oct 10, 2022

Filed

vs. sector median

+14 wks slower

Tracked as a single-filing incident — the only disclosure on record for this event so far.Confirmed573 affectedView incident

Name: Lewis Brisbois Bisgaard & Smith, PLLC
norm: lewis brisbois bisgaard smith

Name: Bellevue School District No. 405
norm: bellevue school district no 405
Industry: Educationllm

Discovered: Apr 26, 2022
Breach occurred: Mar 30, 2022 – Apr 25, 2022
Undetected for: 27 daysoccurrence → discovery
Materiality determined: —
Notification sent: Oct 10, 2022
Affected individuals: 573state-resident count only
Data types: Identity (basic)Government IDHealth (basic)
Data elements: NameSocial Security numberMedical information
WA-stated cause: Theft or Mistake
WA-stated duration: lifecycle 1-99dexposure 1-99d
WA-stated discovery: Found after the fact
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid Accounts
Threat actor: Internal
Regulator citations: Notified Washington Attorney General
Initial access: valid_credentials

During the incident: Reconfigured network settings and limiting access to the affected folder
Engaged a leading, independent digital forensics and incident response firm
Implemented additional security features in its environment
Retained KROLL to offer complimentary privacy and identity theft protection
Notified all potentially impacted individuals via first class US mail
Changes made: Implemented additional security features in its environment to reduce the risk of a similar incident occurring in the future
Enhanced the security of its digital environment
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 24 weeks(167 days from discovery to filing)
Compliance flags: WA AG >90d
Discovery-date grounding: AG web formThe discovery date came from the AG web-form field, which is systematically later than the detection date stated in the letter. Treat the clock as indicative.

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://agportal-s3bucket.s3.amazonaws.com/databreach/BreachA15592.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Oct 10, 2022
Raw hash: 414a9a7c088152d728ce2edacd981b23c90269fa5ec786d78de165ab8207e4a0

Reporting entityLewis Brisbois Bisgaard & Smith, PLLC

Victim entityBellevue School District No. 405

Incidentdiscovered Apr 26, 2022

Stated responseReconfigured network settings and limiting access to the affected folder

ComplianceWA AG >90d

Extraction provenanceno artifact recorded

Source provenanceagportal-s3bucket.s3.amazonaws.com