UnknownGovernmentGovernmentCustomer Data InvolvedIdentity (basic)Government IDMedium

Massachusetts Department of Revenue

bd_8a81cf7c6ef2191a · schema v1 · pii pii-v1

Severity

Medium

Discovered

—

Filed

Aug 4, 2026

To disclose

—

Affected

1state residents only

Confidence

68%

Full breach record for Massachusetts Department of Revenue →45 incidents on file

The Massachusetts Department of Revenue issued a breach notification letter pursuant to M.G.L. c. 93H, informing individuals of an unauthorized disclosure of personal information. The letter is a template ('SAMPLE NOTICE') containing placeholders for dates and names. It offers 24 months of credit monitoring via Experian and details procedures for placing security freezes with credit bureaus. No specific attack vector, date, or count is provided in this template document.

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Incident timeline — partial

? — ?

Breach window unknown

Aug 4, 2026

Filed

No interval is drawn: no breach start or discovery date is on record for this filing.

Tracked as a single-filing incident — the only disclosure on record for this event so far.Confirmed1 affectedView incident

Name: Massachusetts Department of Revenue
norm: massachusetts department of revenue
Industry: government_public

Name: Massachusetts Department of Revenue
norm: massachusetts department of revenue
Industry: government_public
Industry: Governmentllm

Discovered: —
Materiality determined: —
Notification sent: —
Affected individuals: 1state-resident count only
Data types: Identity (basic)Government ID
Attack vector: Unknown

During the incident: Offering 24 months of credit monitoring services through Experian’s Identity Works
Providing information on how to place a security freeze on credit reports
Source: Quoted from the filing itself, not independently verified.

Compliance flags: — (clock not assessable for this source)

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://www.mass.gov/doc/2026-1283-department-of-revenue/download
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Aug 4, 2026
Raw hash: f71be299e5747ef29d8da999118caeec35db0be0ecc9296177d9dd668320520f

Reporting entityMassachusetts Department of Revenue

Victim entityMassachusetts Department of Revenue

IncidentUnknown

Stated responseOffering 24 months of credit monitoring services through Experian’s Identity Works

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancewww.mass.gov