HackingProfessional ServicesGovernmentProfessional ServicesVulnerability ExploitCapture Stored DataN-DayData ExfiltratedCustomer Data InvolvedPIIIdentity (basic)Government IDHighContained

MAXIMUS, Inc.

bd_72e613c2b523f548 · schema v1 · pii pii-v1

Severity

High

Discovered

May 30, 2023

Filed

Jul 28, 2023

To disclose

8 weeks

Affected

14,769state residents only

Linked

17 filings

Confidence

65%

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

Maximus Human Services, Inc. notified Montana residents of a breach involving unauthorized access to MOVEit Transfer files. The incident, stemming from a vulnerability in Progress Software's MOVEit application, occurred between May 27-31, 2023, and was detected on May 30, 2023. Personal information including names and government IDs was accessed. Maximus engaged forensic experts, patched the system, and offered 24 months of credit monitoring.

J jump to incidentP pin to compareR raw source

Incident timeline

undetected · 3 days

discovery → filing · 8 weeks / 59 days

May 27, 2023

Begins

May 30, 2023

Discovered

Jul 28, 2023

Filed

vs. sector median

10 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

California State AGbd_bf25ea19ea12a1242023-08-18 · +21dVerified
Indiana State AGbd_45d3fdf48f1c933d2023-08-24 · +27dVerified by operator
Vermont State AGbd_67d6131ab83daa012023-08-25 · +28dVerified by operator
Delaware State AGbd_97027e573fc51e132023-08-25 · +28dVerified by operator

Show 6 more filings ↓up to 166d gap

Washington State AGbd_d4deac1eb085d27a2023-08-25 · +28dVerified
New Hampshire State AGbd_fe9387821fda92642023-08-25 · +28dVerified by operator
Hawaii State AGbd_d3d3db6e2dd7a7a82023-08-26 · +29dVerified by operator
Oregon State AGbd_4a2584ab84dfe0f12023-08-29 · +32dVerified by operator
South Carolina State AGbd_a90da3e7c4e0509c2023-08-29 · +32dVerified
Idaho State AGbd_5312733f463970a32024-01-10 · +166dVerified 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: Professional ServicesllmGovernmentllm

Discovered: May 30, 2023
Breach occurred: May 27, 2023 – May 31, 2023
Undetected for: 3 daysoccurrence → discovery
Materiality determined: —
Notification sent: —
Affected individuals: 14,769state-resident count only
Data types: PIIIdentity (basic)Government ID
Attack vector: Unauthorized Access
MITRE ATT&CK: T1190 Exploit Public-Facing ApplicationT1041 Exfiltration Over C2 ChannelT1119 Automated Collection
Threat actor: ExternalFinancial
Regulator citations: Promptly informed the Agency of the incidentNotified and is cooperating with law enforcement
Initial access: exploit_public_facing

During the incident: Began to investigate with the help of nationally recognized cybersecurity experts
Took its MOVEit application offline
Applied vendor recommended actions, including applying new patches made available by Progress
Engaged a forensic investigation firm and a data analysis firm
Offering two years of complimentary credit monitoring, identity restoration, and fraud detection services through Experian
Notified and is cooperating with law enforcement
Changes made: Enhance cybersecurity posture to safeguard against ever evolving cyber threats
Monitor for unusual activity and vulnerabilities
Apply vendor recommended actions as applicable
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 8 weeks(59 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 ↗

Montana State AGJul 28 · first · this page

California State AG+21d

Indiana State AG+27d

Vermont State AG+28d

Delaware State AG+28d

Washington State AG+28d

New Hampshire State AG+28d

Hawaii State AG+29d

Oregon State AG+32d

South Carolina State AG+32d

Idaho State AG+166d

Pattern: first filing Jul 28 (MT), last Jan 10 (ID) — a 166-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://dojmt.gov/wp-content/uploads/OCP/Consumer-notification-letter-488.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Jul 28, 2023
Raw hash: 2ee0b96f9f8ab207c7c0c57d90f6713157cc37201756893b2614bad7b2fc7425

Linked disclosures

Regulatory filings (10) · sorted by filing gap

Reporting entityMAXIMUS, Inc.

Victim entityMAXIMUS, Inc.

Incidentdiscovered May 30, 2023

Stated responseBegan to investigate with the help of nationally recognized cybersecurity experts

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov