HackingTechnologyGovernmentInformationVulnerability ExploitRansomwareSupply Chain (3P Vendor)Data ExfiltratedCustomer Data InvolvedZero-DayPIIIdentity (basic)LowContained

MAXIMUS, Inc.

bd_97027e573fc51e13 · schema v1 · pii pii-v1

Severity

Low

Discovered

May 30, 2023

Filed

Aug 25, 2023

To disclose

12 weeks

Affected

Not disclosed

Linked

17 filings

Confidence

66%

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

Maximus Health Services, Inc. disclosed a security incident involving the MOVEit Transfer vulnerability (Zero Day). Unauthorized access occurred between May 27-31, 2023, resulting in the exfiltration of personal information. Maximus detected the activity on May 30, 2023, took the system offline, and offered two years of credit monitoring. The incident involved a third-party software vulnerability exploited by an external actor.

J jump to incidentP pin to compareR raw source

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
Washington State AGbd_d4deac1eb085d27a2023-08-25Verified
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: MAXIMUS, Inc.
norm: maximus
Domain: maximus.com

Name: MAXIMUS, Inc.
norm: maximus
Domain: maximus.com
Industry: TechnologyllmGovernmentllm

Discovered: May 30, 2023
Breach occurred: May 27, 2023 – May 31, 2023
Undetected for: 3 daysoccurrence → discovery
Materiality determined: —
Notification sent: —
Affected individuals: Not disclosed
Data types: PIIIdentity (basic)
Attack vector: Unauthorized Access
MITRE ATT&CK: T1190 Exploit Public-Facing ApplicationT1486 Data Encrypted for Impact
Threat actor: ExternalFinancial
Regulator citations: notified the Department of the incidentnotified and is cooperating with law enforcement
Initial access: exploit_public_facing

During the incident: Took the MOVEit environment offline early on May 31, 2023
Applied vendor-recommended actions to address the previously unknown vulnerability
Notified and is cooperating with law enforcement
Offering you two years of complimentary credit monitoring, identity restoration, and fraud detection services through Experian
Changes made: Applied vendor-recommended actions to address the previously unknown vulnerability
Continue to enhance our cybersecurity program to safeguard from cyber threats
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 12 weeks(87 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

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

Washington State AG+21d

New Hampshire State AG+21d

Delaware 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://attorneygeneral.delaware.gov/wp-content/uploads/sites/50/2023/09/Maximus-Sample-Individual-Notice-Letter.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: efc8349f7232a96b178a990f06189ff7d052b4d5e9c5c0226450e62ea5d23054

Linked disclosures

Regulatory filings (10) · sorted by filing gap

Reporting entityMAXIMUS, Inc.

Victim entityMAXIMUS, Inc.

Incidentdiscovered May 30, 2023

Stated responseTook the MOVEit environment offline early on May 31, 2023

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenanceattorneygeneral.delaware.gov