HackingHealthcareHealthcareCustomer Data InvolvedIdentity (basic)PIILowContained

Chiesi USA, Inc.

bd_e7cc2b535ec68130 · schema v1 · pii pii-v1

Severity

Low

Discovered

Aug 28, 2025

Filed

Dec 22, 2025

To disclose

17 weeks

Affected

Not disclosed

Linked

5 filings

Confidence

66%

Full breach record for Chiesi USA, Inc. →

Chiesi USA, Inc. notified Vermont AG of a data breach affecting customer personal information (name plus [Extra1]) due to unauthorized access of internal IT infrastructure. Incident discovered August 28, 2025; investigation complete. Chiesi provided 24 months of credit monitoring via Experian.

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Vermont clock✗ VT AG >45 bday17 weeks discovery → filing

⚠ unattributedNo provenance was recorded for this discovery date and it matches no other date on the record. It may be correct, but it is not independently grounded.

Incident timeline

discovery → filing · 17 weeks / 116 days

Aug 28, 2025

Discovered

Dec 22, 2025

Filed

vs. sector median

+7 wks slower

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

New Hampshire State AGbd_10b714aa1a2aa7452025-12-22Verified
Maine State AGbd_30e0baca8a783e6a2025-12-22Candidate
Nebraska State AGbd_6b4dc670fb369d6a2025-12-22Verified
Massachusetts State AGbd_bb041de9a9e094f92025-12-22Verified

Name: Chiesi USA, Inc.
norm: chiesi usa

Name: Chiesi USA, Inc.
norm: chiesi usa
Industry: Healthcarellm

Discovered: Aug 28, 2025
Materiality determined: —
Notification sent: Dec 22, 2025
Affected individuals: Not disclosed
Data types: Identity (basic)PII
Attack vector: Unauthorized Access
MITRE ATT&CK: T1190 Exploit Public-Facing Application
Threat actor: External
Initial access: exploit_public_facing

During the incident: Secured our environment
Completed investigation in partnership with third-party cybersecurity specialists
Implemented additional technical safeguards
Providing 24 months of credit monitoring and identity restoration services through Experian
Changes made: Implemented additional technical safeguards to further enhance the security of our systems
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 17 weeks(116 days from discovery to filing)
Compliance flags: VT AG >45 bday
Discovery-date grounding: unattributedNo provenance was recorded for this discovery date and it matches no other date on the record. It may be correct, but it is not independently grounded.

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 5 filings · 5 states

View merged incident ↗

New Hampshire State AGDec 22 · first

Maine State AGDec 22 · first

Nebraska State AGDec 22 · first

Massachusetts State AGDec 22 · first

Vermont State AGDec 22 · first · this page

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://ago.vermont.gov/document/2025-12-22-chiesi-usa-data-breach-notice-consumers
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Dec 22, 2025
Raw hash: d04ac88b643db0a5b06807cb81e36f4fe427bb92605501b728071089458e467d

Linked disclosures

Regulatory filings (4) · sorted by filing gap

Reporting entityChiesi USA, Inc.

Victim entityChiesi USA, Inc.

Incidentdiscovered Aug 28, 2025

Stated responseSecured our environment

ComplianceVT AG >45 bday

Extraction provenanceno artifact recorded

Source provenanceago.vermont.gov