HackingRetail & ConsumerRetailVulnerability ExploitCapture Stored DataSupply Chain (3P Vendor)Customer Data InvolvedDelayed DiscoveryFinancial accountFinancial credentialsIdentity (basic)LowContained

Pioneer Student

bd_edab483f2b106363 · schema v1 · pii pii-v2

Severity

Low

Discovered

Aug 10, 2026

Filed

Sep 3, 2026

To disclose

24 days

Affected · nationwide

6303 in this filing

Linked

2 filings

Confidence

69%

Pioneer Student discovered on August 10, 2026, that an unauthorized party exploited a vulnerability in a third-party checkout extension to gain access to its e-commerce website starting June 16, 2026. The attacker installed malicious code on the checkout page to capture payment card numbers, expiration dates, CVV codes, billing addresses, and email addresses. The code was active during two periods: June 18-July 22, 2026, and August 4-10, 2026. A total of 630 individuals nationwide, including 3 New Hampshire residents, were affected. Pioneer Student removed the code, patched the vulnerability, rotated credentials, and is offering 12 months of credit monitoring.

J jump to incidentP pin to compareR raw source

Incident timeline

undetected · 55 days

discovery → filing · 24 days

Jun 16, 2026

Begins

Aug 10, 2026

Discovered

Sep 3, 2026

Filed

vs. sector median

4 wks faster

This filing is one of 2 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (1) · sorted by filing gap

Massachusetts State AGbd_4bf3b342ffa9fac52026-09-01 · +2dCandidate

Name: Pioneer Student
norm: pioneer student
Domain: pioneerstudent.com

Name: Pioneer Student
norm: pioneer student
Domain: pioneerstudent.com
Industry: Retail & Consumerllm

Discovered: Aug 10, 2026
Breach occurred: Jun 16, 2026 – Aug 10, 2026
Undetected for: 55 daysoccurrence → discovery
Materiality determined: —
Notification sent: Sep 3, 2026
Affected individuals: 630state + nationwide
Data types: Financial accountFinancial credentialsIdentity (basic)
Attack vector: Third-Party / Supply Chain
MITRE ATT&CK: T1190 Exploit Public-Facing ApplicationT1056 Input Capture
Threat actor: ExternalFinancial
Regulator citations: Notified NH Department of Justice
Initial access: exploit_public_facing

During the incident: Removed the malicious code and unauthorized access
Patched the underlying vulnerability
Rotated encryption keys and credentials
Required all customers to reset their account passwords
Engaged this firm to assist in completing the investigation and coordinating its response
Engaged outside forensic investigators and outside legal counsel to investigate the scope of the incident
Notified our payment processor and payment card networks
Changes made: Patching the vulnerability that allowed unauthorized access, and updating the affected third-party software to its current, vendor-supported version
Rotating encryption keys and credentials used by our website
Requiring all customer accounts to reset their passwords
Working to move payment card entry on our website to a more secure, hosted checkout process that removes raw card data from our own servers
Offering affected individuals twelve (12) months of complimentary credit monitoring services
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 24 days(24 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 2 filings · 2 states

View merged incident ↗

Massachusetts State AGSep 1 · first

New Hampshire State AG+2d · this page

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/pioneer-student-20260903.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Sep 3, 2026
Raw hash: 30440d792dc29cda8c55579df88b793e34bf84090a242d9a9ded0b75efbeffb7

Linked disclosures

Regulatory filings (1) · sorted by filing gap

Reporting entityPioneer Student

Victim entityPioneer Student

Incidentdiscovered Aug 10, 2026

Stated responseRemoved the malicious code and unauthorized access

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov