HackingGovernmentGovernmentStolen CredentialsCustomer Data InvolvedIdentity (basic)Government IDHighContained

Commonwealth of Massachusetts Department of Unemployment Assistance

bd_6d16793b48305891 · schema v1 · pii pii-v1

Severity

High

Discovered

—

Filed

Mar 4, 2026

To disclose

—

Affected

1,324state residents only

Confidence

67%

Full breach record for Commonwealth of Massachusetts Department of Unemployment Assistance →26 incidents on file

The Massachusetts Department of Unemployment Assistance notified individuals that an unauthorized party accessed an employer's online account, viewing personal information including names and Social Security numbers. The agency is offering 24 months of credit monitoring via Experian.

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Incident timeline — partial

? — ?

Breach window unknown

Mar 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.Confirmed1,324 affectedView incident

Name: Commonwealth of Massachusetts Department of Unemployment Assistance
norm: commonwealth of massachusetts department of unemployment assistance
Domain: mass.gov

Name: Commonwealth of Massachusetts Department of Unemployment Assistance
norm: commonwealth of massachusetts department of unemployment assistance
Domain: mass.gov
Industry: Governmentllm

Discovered: —
Materiality determined: —
Notification sent: Mar 5, 2026
Affected individuals: 1,324state-resident count only
Data types: Identity (basic)Government ID
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid Accounts
Threat actor: External
Initial access: valid_credentials

During the incident: Offering 24 months of complimentary credit monitoring through Experian IdentityWorks
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/2026-320-massachusetts-dept-of-unemployment-assistance/download
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Mar 4, 2026
Raw hash: f78c79add88e633e4485dc600816babacb90f4db7d94d457c1809001e2f5ce1b

Reporting entityCommonwealth of Massachusetts Department of Unemployment Assistance

Victim entityCommonwealth of Massachusetts Department of Unemployment Assistance

IncidentUnauthorized Access

Stated responseOffering 24 months of complimentary credit monitoring through Experian IdentityWorks

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancewww.mass.gov