FEDERALItem 1.05 · mandatoryMalwareTechnologyInformationTest & MeasurementRansomwareVulnerability ExploitSupply Chain (Dependency)OpportunisticData EncryptedMediumResolved

Data I/O Corporation

bd_803553648eb7fe25 · schema v1 · pii pii-v1

Severity

Medium

Financial impact

$388K

Discovered

Aug 16, 2025

Filed

Sep 10, 2025

To disclose

25 days

Affected

Not disclosed

Confidence

86%

Full breach record for Data I/O Corporation →3 incidents on file

Data I/O Corporation, a Redmond, WA-based technology company, disclosed in a supplemental Form 8-K that an August 16, 2025 ransomware incident on internal IT systems originated from a vulnerability in a commercially available third-party firewall service. The incident was not targeted, temporarily impacted communications, shipping, receiving, and manufacturing, and has been fully contained and remediated. Estimated Q3 2025 remediation, restoration, and investigation costs total approximately $388,000.

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SEC clockMateriality determined Aug 21, 2025 → Filed Sep 10, 202520d ✗ SEC 4-day late25 days discovery → filing

⚠ occurrence dateThe stored discovery date equals the breach OCCURRENCE date. Detection is normally later, so this OVERSTATES the delay — a 'late' verdict here may not be real.

Incident timeline

discovery → filing · 25 days

Aug 16, 2025

Begins

Aug 16, 2025

Discovered

Aug 21, 2025

Scope determined

Sep 10, 2025

Filed

vs. sector median

15 wks faster

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

Name: Data I/O Corporation
norm: data i o
SEC CIK: 0000351998
Domain: dataio.com

Name: Data I/O Corporation
norm: data i o
SEC CIK: 0000351998
Domain: dataio.com
Industry: Technologyllm
NAICS 334515 · Instrument Manufacturing for Measuring and Testing Electricity and Electrical Signals

Discovered: Aug 16, 2025
Breach occurred: Aug 16, 2025
Undetected for: 0 daysoccurrence → discovery
Materiality determined: Aug 21, 2025
Notification sent: —
Affected individuals: Not disclosed
Data types: —
Attack vector: Ransomware
MITRE ATT&CK: T1486 Data Encrypted for ImpactT1190 Exploit Public-Facing ApplicationT1195 Supply Chain Compromise
Threat actor: ExternalFinancial
Regulator citations: Filed Form 8-K with the SEC under Item 1.05 Material Cybersecurity Incidents
Initial access: exploit_public_facing

During the incident: Engaged leading cybersecurity experts to support the IT system recovery and conduct a comprehensive investigation
Restored the affected systems
Completely contained and remediated the Incident
Changes made: Improved and strengthened its IT systems
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 25 days(25 days from discovery to filing)
Compliance flags: SEC 4-day late · 20d
Discovery-date grounding: occurrence dateThe stored discovery date equals the breach OCCURRENCE date. Detection is normally later, so this OVERSTATES the delay — a 'late' verdict here may not be real.
Clock breakdown: Statute Window Elapsed Threshold Status
SEC
Materiality determined: Aug 21, 2025
→ Filed: Sep 10, 2025
20d cal. 4 business days SEC 4-day late

Statute	Window	Elapsed	Threshold	Status
SEC	Materiality determined: Aug 21, 2025 → Filed: Sep 10, 2025	20d cal.	4 business days	SEC 4-day late

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 filing

Unlocks: discovery date, data types, affected count, compliance clock.

SEC 8-K / victim statementThis record

Unlocks: materiality, stated response, full audit trail. Ceiling removed.

Source URL: https://www.sec.gov/Archives/edgar/data/351998/000165495425010613/daio_8k.htm
DisclosureLens renders the full SEC/HHS filing inline below from the originating regulator’s public record (§4.5 fair report privilege).
Filed at: Sep 10, 2025
Raw hash: 34f454688fa1d5793cce4a0c4b0ee37e4fd4ef7c6da30661e8ce519cc249fa9a

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Reporting entityData I/O Corporation

Victim entityData I/O Corporation

Incidentdiscovered Aug 16, 2025

Stated responseEngaged leading cybersecurity experts to support the IT system recovery and conduct a comprehensive investigation

ComplianceSEC 4-day late

Extraction provenanceno artifact recorded

Source provenancewww.sec.gov

Source filing