DisclosureLens
HackingGovernmentGovernmentCustomer Data InvolvedGovernment IDHighContained

Alameda-Contra Costa Transit District

bd_9d023167638599a6 · schema v1 · pii pii-v1

Severity

High

Discovered

Jan 4, 2021

Filed

Mar 15, 2021

To disclose

10 weeks

Affected · nationwide

38,2343 in this filing

Linked

5 filings

Confidence

50%
Full breach record for Alameda-Contra Costa Transit District →

Alameda-Contra Costa Transit District, a government entity, experienced an external system breach (hacking) on April 7, 2020. The breach was discovered on January 4, 2021. The names and Social Security numbers of 3 Maine residents were compromised. Affected individuals were notified on March 11, 2021, and offered one year of identity protection services through Experian.

Maine clockDiscovered Jan 4, 2021 → Filed with AG Mar 15, 202170d ⏱ ME AG >30d10 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 · 272 days
discovery → filing · 10 weeks / 70 days

Apr 7, 2020

Begins

Jan 4, 2021

Discovered

Mar 15, 2021

Filed

This filing is one of 5 filings about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (4) · sorted by filing gap

Filing propagation · 5 filings · 5 states

View merged incident ↗
Montana State AGMar 11 · first
Indiana State AGMar 11 · first
California State AG+4d
Massachusetts State AG+4d
Maine State AG+4d · 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.