HackingTechnologyHealthcareInformationVulnerability ExploitZero-DayData ExfiltratedSupply Chain (3P Vendor)Identity (basic)Government IDFinancial accountMediumContained

PAREXEL INTERNATIONAL, INC.

bd_5fa13ba676bcd123 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Oct 4, 2025

Filed

Dec 17, 2025

To disclose

11 weeks

Affected

36state residents only

Linked

10 filings

Confidence

66%

Full breach record for PAREXEL INTERNATIONAL, INC. →

Parexel International, LLC notified Montana residents of a security incident involving a third-party vendor (Oracle) hosting its Oracle E-Business Suite. A zero-day exploit on October 4, 2025, led to unauthorized access. Affected data included names, DOBs, SSNs, and financial account numbers. Parexel disconnected the environment, applied patches, and engaged forensic experts.

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Incident timeline

discovery → filing · 11 weeks / 74 days

Oct 4, 2025

Discovered

Dec 17, 2025

Filed

vs. sector median

8 wks faster

This filing is one of 10 about the same incident.View merged incident

Part of ORACLE CORPORATION supply-chain incident (2025) — a supply-chain cascade affecting multiple organizations.View cascade →

Linked disclosures

Why this link?

Regulatory filings (9) · sorted by filing gap

Texas State AGbd_0288fc926d272d312025-12-17Candidate
Massachusetts State AGbd_56f59d1075c371fc2025-12-17Verified
New Hampshire State AGbd_5cf5bdff6a9f9cde2025-12-17Verified
California State AGbd_7678d521c76b2a6b2025-12-17Verified

Show 5 more filings ↓up to 16d gap

Nebraska State AGbd_7934ff5031310fd32025-12-17Verified
Vermont State AGbd_937062a523a21f332025-12-17Verified
Maine State AGbd_a687dffb1206e0f02025-12-17Verified
Indiana State AGbd_a9becd46a78217912025-12-17Verified
Illinois State AGbd_101fe08b342583c62025-12-01 · +16dVerified

Name: PAREXEL INTERNATIONAL, INC.
norm: parexel international

Name: PAREXEL INTERNATIONAL, INC.
norm: parexel international
Industry: TechnologyllmHealthcarellm

Discovered: Oct 4, 2025
Materiality determined: —
Notification sent: Dec 17, 2025
Affected individuals: 36state-resident count only
Data types: Identity (basic)Government IDFinancial account
Data elements: Date of birth
Attack vector: Unauthorized Access
MITRE ATT&CK: T1190 Exploit Public-Facing ApplicationT1078 Valid Accounts
Threat actor: External
Initial access: exploit_public_facing

During the incident: Immediately engaged third-party cybersecurity experts to investigate
Immediately disconnected Oracle EBS from our network
Applied the patch addressing the zero-day vulnerability as soon as it was made available by Oracle
Conducted an in-depth review of the files to understand what information may have been involved
Offering 24 months of identity monitoring and theft resolution services
Changes made: Applied the patch addressing the zero-day vulnerability
Following the guidance of Oracle and our cybersecurity partners to ensure ongoing security of the Oracle environment
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 11 weeks(74 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 10 filings · 10 states

View merged incident ↗

Illinois State AGDec 1 · first

Texas State AG+16d

Massachusetts State AG+16d

New Hampshire State AG+16d

California State AG+16d

Nebraska State AG+16d

Vermont State AG+16d

Maine State AG+16d

Indiana State AG+16d

Montana State AG+16d · this page

Pattern: first filing Dec 1 (IL), last Dec 17 (MT) — a 16-day rolling notification. Rolling spreads often mean counsel is filing as thresholds trip per state. Why this link?

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/2026/03/Consumer-notification-letter-10.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Dec 17, 2025
Raw hash: 78fa70dad80634d65d6da395b700dc2a91129c431d3f57a93abf4192d8842a6d

Linked disclosures

Regulatory filings (9) · sorted by filing gap

Reporting entityPAREXEL INTERNATIONAL, INC.

Victim entityPAREXEL INTERNATIONAL, INC.

Incidentdiscovered Oct 4, 2025

Stated responseImmediately engaged third-party cybersecurity experts to investigate

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov