FEDERALItem 1.05 · mandatoryHackingTechnologyInformationStolen CredentialsSupply Chain (3P Vendor)Data ExfiltratedCustomer Data InvolvedPIIIdentity (basic)LowContained

8X8 INC /DE/

bd_71ac962cb6631ae0 · schema v1 · pii pii-v1

Severity

Low

Discovered

Jun 13, 2026

Filed

Jun 23, 2026

To disclose

10 days

Affected

Not disclosed

Confidence

66%

Full breach record for 8X8 INC /DE/ →

8x8, Inc. disclosed a cybersecurity incident involving unauthorized access to its Salesforce CRM system via a third-party integration with Klue Labs, Inc. The threat actor exploited the integration to exfiltrate customer contact information and contract details between June 11 and 12, 2026. 8x8 discovered the breach on June 13, 2026, disabled the integration, and is implementing additional security measures. The incident is not expected to have a material financial impact.

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SEC clockMateriality determined Jun 17, 2026 → Filed Jun 23, 20266d ✓ SEC 4-day OK10 days 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

undetected · 2 days

discovery → filing · 11 days

Jun 11, 2026

Begins

Jun 13, 2026

Discovered

Jun 17, 2026

Scope determined

Jun 23, 2026

Filed

vs. sector median

17 wks faster

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

Name: 8X8 INC /DE/
norm: 8x8 inc de
SEC CIK: 0001023731

Name: 8X8 INC /DE/
norm: 8x8 inc de
Industry: Technologyllm

Discovered: Jun 13, 2026
Breach occurred: Jun 11, 2026 – Jun 12, 2026
Undetected for: 2 daysoccurrence → discovery
Materiality determined: Jun 17, 2026
Notification sent: —
Affected individuals: Not disclosed
Data types: PIIIdentity (basic)
Attack vector: Third-Party / Supply Chain
MITRE ATT&CK: T1195 Supply Chain CompromiseT1078 Valid AccountsT1041 Exfiltration Over C2 Channel
Threat actor: ExternalFinancial
Regulator citations: notifying the relevant regulatory authorities
Third party: via Klue Labs, Inc.vendor
Initial access: supply_chain

During the incident: Disabled the compromised integration
Removed the unauthorized access
Implementing additional security measures
Changes made: Implementing additional security measures to reduce the risk of similar unauthorized access in the future
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 10 days(10 days from discovery to filing)
Compliance flags: SEC 4-day OK · 6d
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.
Clock breakdown: Statute Window Elapsed Threshold Status
SEC
Materiality determined: Jun 17, 2026
→ Filed: Jun 23, 2026
6d cal. 4 business days SEC 4-day OK

Statute	Window	Elapsed	Threshold	Status
SEC	Materiality determined: Jun 17, 2026 → Filed: Jun 23, 2026	6d cal.	4 business days	SEC 4-day OK

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/1023731/000102373126000084/eght-20260617.htm
DisclosureLens renders the full SEC/HHS filing inline below from the originating regulator’s public record (§4.5 fair report privilege).
Filed at: Jun 23, 2026
Raw hash: ba5fac3fdb4b8d5b314641c8018dfaad28d2aae01e1319323d7f9101987f625a

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Reporting entity8X8 INC /DE/

Victim entity8X8 INC /DE/

Incidentdiscovered Jun 13, 2026

Stated responseDisabled the compromised integration

ComplianceSEC 4-day OK

Extraction provenanceno artifact recorded

Source provenancewww.sec.gov

Source filing