Where does the Transport Workers Union Local 100 Trade Union case file come from?

Every entry is taken from the breach report Transport Workers Union Local 100 Trade Union lodged with the Massachusetts Attorney General. Nothing here is estimated.

Why do the incident date and the report date differ?

Companies usually investigate before they report. The gap between the two dates shows how long that took.

What does the records-affected figure count?

It is the number the company gave the state. It can cover residents of that state only, so the national total may be higher.

Does this case file change over time?

Yes. When a company files an update or a new state publishes its copy of the report, the dates and counts here are refreshed.

Case file

Case File: Transport Workers Union Local 100 Trade Union Data Breach

This file collects the dated facts on record for the Transport Workers Union Local 100 Trade Union incident. The state report is dated April 24, 2026.

Timeline

April 24, 2026Report filed in MassachusettsDate the notice was lodged with the Massachusetts Attorney General.

Case facts

Filing state: Massachusetts
Date reported: April 24, 2026
Receiving office: Massachusetts Attorney General

Case notes

The Transport Workers Union Local 100 Trade Union filed a report with the Massachusetts Attorney General on April 24, 2026, disclosing a data security incident. The union, which represents transit employees, is currently investigating the scope and nature of this breach.

Public records available do not specify the exact type of security incident that occurred or the precise categories of personal information that were compromised. However, the report indicates that an incident involving member data was identified.

As a critical labor organization, the Transport Workers Union Local 100 manages extensive member information. This includes detailed membership records, employment histories, and information related to benefits and payroll for its workers.

While the specific data types involved are not detailed in the filing, any exposure of personal information carries potential risks. Affected individuals may face unauthorized access to other accounts or attempts at impersonation.

Individuals who believe they may be impacted by this incident should remain vigilant. It is recommended to monitor personal accounts for any suspicious activity and to exercise caution with unsolicited communications that request personal details.

Questions about this case file

Where does the Transport Workers Union Local 100 Trade Union case file come from?: Every entry is taken from the breach report Transport Workers Union Local 100 Trade Union lodged with the Massachusetts Attorney General. Nothing here is estimated.
Why do the incident date and the report date differ?: Companies usually investigate before they report. The gap between the two dates shows how long that took.
What does the records-affected figure count?: It is the number the company gave the state. It can cover residents of that state only, so the national total may be higher.
Does this case file change over time?: Yes. When a company files an update or a new state publishes its copy of the report, the dates and counts here are refreshed.

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