HackingTechnologyProfessional ServicesInformationVulnerability ExploitZero-DayData ExfiltratedData PublishedSupply Chain (3P Vendor)Customer Data InvolvedIdentity (basic)Government IDHighContained

MAXIMUS, Inc.

bd_fe9387821fda9264 · schema v1 · pii pii-v1

Severity

High

Discovered

May 30, 2023

Filed

Aug 25, 2023

To disclose

12 weeks

Affected

6,376state residents only

Linked

17 filings

Confidence

66%

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

Maximus, Inc. notified the New Hampshire Attorney General of a data security incident involving its MOVEit Transfer environment. An unauthorized party exploited a critical zero-day vulnerability in the third-party software (Progress Software) between May 27 and May 31, 2023, to exfiltrate files containing personal information of at least 6,376 New Hampshire residents. Maximus detected the activity on May 30, 2023, took the system offline, and began notifying residents on August 24, 2023. Remediation included credit monitoring via Experian and cooperation with the FBI.

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
Delaware State AGbd_97027e573fc51e132023-08-25Verified by operator
Washington State AGbd_d4deac1eb085d27a2023-08-25Verified
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: TechnologyllmProfessional Servicesllm

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: 6,376state-resident count only
Data types: Identity (basic)Government ID
Attack vector: Third-Party / Supply Chain
MITRE ATT&CK: T1190 Exploit Public-Facing ApplicationT1486 Data Encrypted for ImpactT1041 Exfiltration Over C2 Channel
Threat actor: ExternalFinancial
Regulator citations: Notified 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 affected New Hampshire residents with two years of complementary IdentityWorks credit monitoring, identity restoration, and fraud detection services, through Experian
Notifying the major consumer reporting agencies regarding the incident
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

Delaware State AG+21d

Washington State AG+21d

New Hampshire 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://mm.nh.gov/files/uploads/doj/remote-docs/maximus-20230825.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: ba619f37fe4adf11e44165f43b0ba6ce9e8f6672673d00169cfa9c7d0b319413

Linked disclosures

Regulatory filings (10) · sorted by filing gap

Reporting entityMAXIMUS, Inc.

Victim entityMAXIMUS, Inc.

Incidentdiscovered May 30, 2023

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

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov