HackingHealthcareFinancial ServicesHealthcareVulnerability ExploitCapture Stored DataZero-DaySupply Chain (3P Vendor)Data ExfiltratedCustomer Data InvolvedPIIPHIIdentity (basic)Health (basic)LowContained

Lineage

bd_3928b2315b9e5450 · schema v1 · pii pii-v1

Severity

Low

Discovered

Jun 1, 2023

Filed

Feb 7, 2024

To disclose

36 weeks

Affected

Not disclosed

Linked

3 filings

Confidence

65%

Full breach record for Lineage →

Delta Dental of California and affiliates experienced a data security incident involving the MOVEit Transfer software. Unauthorized actors exploited a previously unknown vulnerability in the software, accessing and acquiring information between May 27 and May 30, 2023. The company discovered the incident on June 1, 2023. Affected data includes personal and health information. The company engaged forensic experts, notified law enforcement, and is offering 24 months of identity monitoring.

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California clockDiscovered Jun 1, 2023 → Notified Nov 27, 2023179d ✗ CA 60-day late36 weeks discovery → filing

Incident timeline

undetected · 5 days

discovery → filing · 36 weeks / 251 days

May 27, 2023

Begins

Jun 1, 2023

Discovered

Feb 7, 2024

Filed

vs. sector median

+27 wks slower

This filing is one of 3 filings about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (2) · sorted by filing gap

Massachusetts State AGbd_07ee4af5a443582f2024-02-07Verified
Illinois State AGbd_9a753f776f9da6922024-02-01 · +6dCandidate

Name: Lineage
norm: lineage
Domain: lineage.tools

Name: Lineage
norm: lineage
Domain: lineage.tools
Industry: HealthcarellmFinancial Servicesllm

Discovered: Jun 1, 2023
Breach occurred: May 27, 2023 – May 30, 2023
Undetected for: 5 daysoccurrence → discovery
Materiality determined: —
Notification sent: Nov 27, 2023
Affected individuals: Not disclosed
Data types: PIIPHIIdentity (basic)Health (basic)
Attack vector: Unknown
MITRE ATT&CK: T1190 Exploit Public-Facing ApplicationT1041 Exfiltration Over C2 Channel
Threat actor: External
Regulator citations: Notified law enforcement
Initial access: exploit_public_facing

During the incident: Launched a thorough investigation
Stopped access to the MOVEit software
Removed the malicious files
Conducted a thorough analysis of the MOVEit database
Applied the recommended patches
Reset administrative passwords to the MOVEit system
Enhanced unauthorized access monitoring related to MOVEit Transfer file access, malicious activity, and ransomware activity
Engaged independent third-party experts in computer forensics, analytics, and data mining
Notified law enforcement of the incident and have been cooperating with them
Changes made: Offering 24 months of free identity monitoring services through Kroll
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 36 weeks(251 days from discovery to filing)
Compliance flags: CA 60-day late · 179d
Discovery-date grounding: letter-groundedThe discovery date is the detection date narrated in the notification letter — the defensible tier.
Clock breakdown: Statute Window Elapsed Threshold Status
California
Discovered: Jun 1, 2023
→ Notified: Nov 27, 2023
179d 60 days (analyst band, pre-2026 discoveries) CA 60-day late

Statute	Window	Elapsed	Threshold	Status
California	Discovered: Jun 1, 2023 → Notified: Nov 27, 2023	179d	60 days (analyst band, pre-2026 discoveries)	CA 60-day late

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 3 filings · 3 states

View merged incident ↗

Illinois State AGFeb 1 · first

Massachusetts State AG+6d

California State AG+6d · this page

Pattern: first filing Feb 1 (IL), last Feb 7 (CA) — a 6-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.

Source URL: https://oag.ca.gov/ecrime/databreach/reports/sb24-580628
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Feb 7, 2024
Raw hash: 87915df6d6a48bb0b7e17888073a5cb34ca5a3bc4d467e4f3ba175dfb9a43d0f

Linked disclosures

Regulatory filings (2) · sorted by filing gap

Reporting entityLineage

Victim entityLineage

Incidentdiscovered Jun 1, 2023

Stated responseLaunched a thorough investigation

ComplianceCA 60-day late

Extraction provenanceno artifact recorded

Source provenanceoag.ca.gov