HackingProfessional ServicesTechnologyProfessional ServicesVulnerability ExploitZero-DayData ExfiltratedSupply Chain (3P Vendor)TargetedIdentity (basic)Government IDHighResolved

MAXIMUS, Inc.

bd_d4deac1eb085d27a · schema v1 · pii pii-v1

Severity

High

Discovered

May 30, 2023

Filed

Aug 25, 2023

To disclose

12 weeks

Affected

70,847state residents only

Linked

17 filings

Confidence

69%

Full breach record for MAXIMUS, Inc. →7 incidents on file

Maximus, Inc. reported a supplemental data security incident to Washington AG regarding unauthorized access to MOVEit Transfer files between May 27-31, 2023. The incident involved a zero-day vulnerability in the third-party software. 70,847 Washington residents were notified on August 24, 2023, receiving 24 months of credit monitoring. Data included names, addresses, DOBs, and SSNs.

J jump to incidentP pin to compareR raw source

Washington clock⏱ WA AG >30d12 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 · 3 days

discovery → filing · 12 weeks / 87 days

May 27, 2023

Begins

May 30, 2023

Discovered

Aug 25, 2023

Filed

vs. sector median

6 wks faster

This filing is one of 17 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (10) · sorted by filing gap

Vermont State AGbd_67d6131ab83daa012023-08-25Verified by operator
Delaware State AGbd_97027e573fc51e132023-08-25Verified by operator
New Hampshire State AGbd_fe9387821fda92642023-08-25Verified by operator
Hawaii State AGbd_d3d3db6e2dd7a7a82023-08-26 · +1dVerified by operator

Show 6 more filings ↓up to 138d gap

Indiana State AGbd_45d3fdf48f1c933d2023-08-24 · +1dVerified by operator
Oregon State AGbd_4a2584ab84dfe0f12023-08-29 · +4dVerified by operator
South Carolina State AGbd_a90da3e7c4e0509c2023-08-29 · +4dVerified
California State AGbd_bf25ea19ea12a1242023-08-18 · +7dVerified
HHS OCRbd_dedafa3bd216907a2023-08-04 · +21dVerified
Idaho State AGbd_5312733f463970a32024-01-10 · +138dVerified by operator

Showing first 10 of 16 linked disclosures.

Name: HOGAN LOVELLS US LLP
norm: hogan lovells us

Name: MAXIMUS, Inc.
norm: maximus
Domain: maximus.com
Industry: Professional ServicesllmTechnologyllm

Discovered: May 30, 2023
Breach occurred: May 27, 2023 – May 31, 2023
Undetected for: 3 daysoccurrence → discovery
Materiality determined: —
Notification sent: Aug 24, 2023
Affected individuals: 70,847state-resident count only
Data types: Identity (basic)Government ID
Data elements: NameSocial Security numberDate of birth
WA-stated cause: Unauthorized Access
WA-stated duration: lifecycle 1-99dexposure 1-99d
WA-stated discovery: Found while ongoing
Attack vector: Third-Party / Supply Chain
MITRE ATT&CK: T1190 Exploit Public-Facing ApplicationT1041 Exfiltration Over C2 Channel
Threat actor: ExternalFinancial
Regulator citations: Notified the Office of the Attorney General for WashingtonNotified the Federal Bureau of Investigation
Initial access: exploit_public_facing

During the incident: Launched an investigation with the assistance of legal counsel and leading cybersecurity experts
Took its MOVEit Transfer environment offline
Notified the impacted government agencies
Implemented vendor recommended security patches
Notified, and continues to cooperate with, the Federal Bureau of Investigation
Changes made: Enhance its cybersecurity posture to safeguard against ever evolving cyber threats
Building on its written information security program
Offered 24 months of complementary IdentityWorks credit monitoring, identity restoration, and fraud detection services through Experian
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 12 weeks(87 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 · 11 filings · 11 states

View merged incident ↗

HHS OCRAug 4 · first

California State AG+14d

Indiana State AG+20d

Vermont State AG+21d

Delaware State AG+21d

New Hampshire State AG+21d

Washington State AG+21d · this page

Hawaii State AG+22d

Oregon State AG+25d

South Carolina State AG+25d

Idaho State AG+159d

Pattern: first filing Aug 4 (VA), last Jan 10 (ID) — a 159-day rolling notification. Rolling spreads often mean counsel is filing as thresholds trip per state. Why this link?

Cascade drawn from the first 10 linked disclosures of 16 — the full spread may be wider.

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/BreachM15654.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Aug 25, 2023
Raw hash: cb85ac831b4af6f5415ec5fb667c0e95fd9d3ac49fb61aacc6cdd10354d9b6c3

Linked disclosures

Regulatory filings (10) · sorted by filing gap

Reporting entityHOGAN LOVELLS US LLP

Victim entityMAXIMUS, Inc.

Incidentdiscovered May 30, 2023

Stated responseLaunched an investigation with the assistance of legal counsel and leading cybersecurity experts

ComplianceWA AG >30d

Extraction provenanceno artifact recorded

Source provenanceagportal-s3bucket.s3.amazonaws.com