HackingFinancial ServicesProfessional ServicesFinanceVulnerability ExploitZero-DaySupply Chain (3P Vendor)Data ExfiltratedCustomer Data InvolvedIdentity (basic)Government IDCVE-2023-34362HighContained

Milliman Solutions LLC

bd_7d137035535ea7be · schema v1 · pii pii-v1

Severity

High

Discovered

Jun 8, 2023

Filed

Jul 17, 2023

To disclose

6 weeks

Affected

17,235state residents only

Linked

6 filings

Confidence

71%

Full breach record for Milliman Solutions LLC →2 incidents on file

Milliman Solutions, LLC d/b/a Milliman Intelliscript reported a data breach affecting 17,235 Washington residents. The incident involved a third-party vendor, Pension Benefit Information, LLC, whose MOVEit Transfer software was exploited via zero-day vulnerability CVE-2023-34362. Unauthorized access occurred May 29-30, 2023, resulting in the exfiltration of names, addresses, DOBs, and SSNs. Notifications were sent July 17, 2023, including 12 months of credit monitoring.

J jump to incidentP pin to compareR raw source

Washington clock⏱ WA AG >30d6 weeks discovery → filing

⚠ AG web formThe discovery date came from the AG web-form field, which is systematically later than the detection date stated in the letter. Treat the clock as indicative.

Incident timeline

undetected · 10 days

discovery → filing · 6 weeks / 39 days

May 29, 2023

Begins

Jun 8, 2023

Discovered

Jul 17, 2023

Filed

vs. sector median

3 wks faster

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

Part of Pension Benefit Information, LLC supply-chain incident (2023) — a supply-chain cascade affecting multiple organizations.View cascade →

Linked disclosures

Why this link?

Regulatory filings (5) · sorted by filing gap

Oregon State AGbd_24ccb026f721af632023-07-17Candidate
Indiana State AGbd_3919dcb3a8e2950b2023-07-17Verified
Montana State AGbd_3b1222619a7fe87f2023-07-17Verified
Massachusetts State AGbd_5359527b1010b4882023-07-17Verified

Show 1 more filing ↓

Maine State AGbd_8674a4bac38b2e612023-07-17Verified

Name: Milliman Solutions LLC
norm: milliman solutions
Domain: milliman.com

Name: Milliman Solutions LLC
norm: milliman solutions
Domain: milliman.com
Also named: Milliman Solutions, LLCdba oflegal entity
Milliman Intelliscriptdba oftrade name
Industry: Financial ServicesllmProfessional Servicesllm

Discovered: Jun 8, 2023
Breach occurred: May 29, 2023 – May 30, 2023
Undetected for: 10 daysoccurrence → discovery
Materiality determined: —
Notification sent: Jul 17, 2023
Affected individuals: 17,235state-resident count only
Data types: Identity (basic)Government ID
Data elements: NameSocial Security numberDate of birth
WA-stated cause: Cyberattack
WA-stated duration: lifecycle 1-99dexposure 1-99d
WA-stated discovery: Found after the fact
Attack vector: Third-Party / Supply Chain
MITRE ATT&CK: T1195 Supply Chain CompromiseT1041 Exfiltration Over C2 ChannelT1190 Exploit Public-Facing Application
Threat actor: ExternalFinancial
Regulator citations: Filed notice with Washington Office of the Attorney General
Initial access: exploit_public_facing
CVE references: CVE-2023-34362

During the incident: Stopped transferring data to PBI pending further evaluation of PBI’s information security practices
Evaluating potential vendor management and security enhancements
Providing written notification to affected individuals
Offering 12 months of cost-free credit monitoring
Changes made: Patching the vulnerability in MOVEit Transfer software
Reviewing and enhancing information security policies and procedures
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 6 weeks(39 days from discovery to filing)
Compliance flags: WA AG >30d
Discovery-date grounding: AG web formThe discovery date came from the AG web-form field, which is systematically later than the detection date stated in the letter. Treat the clock as indicative.

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 6 filings · 6 states

View merged incident ↗

Oregon State AGJul 17 · first

Indiana State AGJul 17 · first

Montana State AGJul 17 · first

Massachusetts State AGJul 17 · first

Maine State AGJul 17 · first

Washington State AGJul 17 · 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://agportal-s3bucket.s3.amazonaws.com/databreach/BreachM15351.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Jul 17, 2023
Raw hash: 8262a4835ade94224da7a25ebae9a65aa71655fd703aa9c3479938b12563356d

Linked disclosures

Regulatory filings (5) · sorted by filing gap

Reporting entityMilliman Solutions LLC

Victim entityMilliman Solutions LLC

Incidentdiscovered Jun 8, 2023

Stated responseStopped transferring data to PBI pending further evaluation of PBI’s information security practices

ComplianceWA AG >30d

Extraction provenanceno artifact recorded

Source provenanceagportal-s3bucket.s3.amazonaws.com