HackingManufacturingManufacturingData ExfiltratedIdentity (basic)LowContained

Cliff Viessman, Inc

bd_2de4a46561dc0399 · schema v1 · pii pii-v1

Severity

Low

Discovered

Aug 5, 2025

Filed

Sep 10, 2025

To disclose

5 weeks

Affected

Not disclosed

Linked

6 filings

Confidence

67%

Full breach record for Cliff Viessman, Inc →

Cliff Viessman, Inc. notified consumers of a cybersecurity event discovered on August 5, 2025, where an unauthorized party accessed its IT network and copied files containing names. The company engaged forensic specialists, secured its network, and is offering 12 months of credit monitoring services to affected individuals.

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Vermont clock⏱ VT AG >14 bday5 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 · 5 weeks / 36 days

Aug 5, 2025

Discovered

Sep 10, 2025

Filed

vs. sector median

6 wks faster

This filing is one of 6 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (5) · sorted by filing gap

New Hampshire State AGbd_320845cb79cca05a2025-09-10Verified
Nebraska State AGbd_6766249f21ca103b2025-09-10Verified
Montana State AGbd_6a0be07d9d2a06892025-09-10Candidate
Massachusetts State AGbd_6e2d97be442fbcbe2025-09-10Verified

Show 1 more filing ↓

Indiana State AGbd_9fa7938fd11a53da2025-09-10Verified

Name: Cliff Viessman, Inc
norm: cliff viessman

Name: Cliff Viessman, Inc
norm: cliff viessman
Industry: Manufacturingllm

Discovered: Aug 5, 2025
Materiality determined: —
Notification sent: Sep 10, 2025
Affected individuals: Not disclosed
Data types: Identity (basic)
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid AccountsT1119 Automated Collection
Threat actor: External

During the incident: Took steps to lock down and secure our network
Engaged third-party cybersecurity specialists to assist with our response and to conduct a comprehensive forensic investigation
Implemented additional technical safeguards and enhanced security measures
Providing you with access to Single Bureau Credit Monitoring/Single Bureau Credit Report/Single Bureau Credit Score services at no charge
Providing you with proactive fraud assistance
Changes made: Implemented additional technical safeguards and enhanced security measures
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 5 weeks(36 days from discovery to filing)
Compliance flags: VT AG >14 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 · 6 filings · 6 states

View merged incident ↗

New Hampshire State AGSep 10 · first

Nebraska State AGSep 10 · first

Montana State AGSep 10 · first

Massachusetts State AGSep 10 · first

Indiana State AGSep 10 · first

Vermont State AGSep 10 · 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/2025-09-10-cliff-viessman-data-breach-notice-consumers
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Sep 10, 2025
Raw hash: 858f746c2029f3f6952e230a6b3835fa3ada9661c70f41e6b428b815e5b7e271

Linked disclosures

Regulatory filings (5) · sorted by filing gap

Reporting entityCliff Viessman, Inc

Victim entityCliff Viessman, Inc

Incidentdiscovered Aug 5, 2025

Stated responseTook steps to lock down and secure our network

ComplianceVT AG >14 bday

Extraction provenanceno artifact recorded

Source provenanceago.vermont.gov