DisclosureLens
Social EngineeringTechnologyInformationPhishingDelayed DiscoveryPIIIdentity (basic)LowActive

Mattson Technology, Inc.

bd_aff0c9d79d4c49a4 · schema v1 · pii pii-v1

Severity

Low

Discovered

—

Filed

Mar 17, 2023

To disclose

—

Affected

Not disclosed

Linked

5 filings

Confidence

63%
Full breach record for Mattson Technology, Inc. →3 incidents on file
CorrectionPublished Oct 10, 2026

The Vermont Attorney General's site lists this notice under 2022-03-17. The notice letter it holds is dated March 17, 2023, so we publish 2023-03-17 as the date it was filed.

Read their full statement

Mattson Technology, Inc. notified consumers of a security incident where an unauthorized individual accessed the network between July 8 and October 3, 2022, following a suspicious email received by employees on October 3, 2022. The incident involved the access and removal of files containing personal information. Mattson engaged third-party specialists, reported to federal law enforcement, and offered 12 months of credit monitoring.

Incident timeline

Jul 8, 2022

Begins

Mar 17, 2023

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 ↗
Massachusetts State AGMar 17 · first
Maine State AGMar 17 · first
Montana State AGMar 17 · first
Vermont State AGMar 17 · first · this page

Pattern: first filing Mar 17 (MA), last Mar 27 (NH) — a 10-day rolling notification. Rolling spreads often mean counsel is filing as thresholds trip per state. Why this link?

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.