Where does the Glasshouse Media case file come from?

Every entry is taken from the breach report Glasshouse Media 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: Glasshouse Media Data Breach

This file collects the dated facts on record for the Glasshouse Media incident. The state report is dated March 23, 2026.

Timeline

March 23, 2026Report filed in MassachusettsDate the notice was lodged with the Massachusetts Attorney General.

Case facts

Filing state: Massachusetts
Date reported: March 23, 2026
Receiving office: Massachusetts Attorney General

Case notes

Glasshouse Media, a prominent digital media production, publishing, and marketing analytics firm based in Massachusetts, recently filed a report with the state's Attorney General concerning a data security incident. This filing, made on March 23, 2026, indicates an unauthorized compromise of the company's digital systems, which is currently under investigation.

As part of its operations, Glasshouse Media routinely collects, processes, and stores a significant volume of personal information through multi-channel advertising campaigns and managing extensive subscriber and consumer databases. The reported incident suggests that this information, held within the company's digital footprint, may have been accessed by unauthorized parties.

The exposure of personal information, even when specific categories are not detailed, carries inherent risks. Individuals whose data was involved in such a security event could face an increased threat of various malicious activities, including attempts at identity theft, financial fraud, or targeted phishing campaigns.

For companies operating within the Commonwealth of Massachusetts, maintaining robust information security programs is a legal obligation under state data privacy laws. A breach of this nature often points to potential vulnerabilities in these protective measures, underscoring the importance of vigilance by affected individuals.

To help mitigate potential risks, individuals who receive notification of this incident should closely monitor their financial accounts and credit reports for any suspicious activity. It is also advisable to consider updating passwords for online services and to exercise caution regarding any unsolicited communications that might attempt to acquire more of your personal information.

Questions about this case file

Where does the Glasshouse Media case file come from?: Every entry is taken from the breach report Glasshouse Media 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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