HackingEducationEducationStolen CredentialsSupply Chain (3P Vendor)Data ExfiltratedCustomer Data InvolvedPIIIdentity (basic)LowContained

HARVARD BUSINESS SCHOOL PUBLISHING CORPORATION

bd_38a233974d7e1468 · schema v1 · pii pii-v1

Severity

Low

Discovered

Dec 29, 2020

Filed

Jan 11, 2021

To disclose

13 days

Affected

1state residents only

Linked

2 filings

Confidence

65%

Full breach record for HARVARD BUSINESS SCHOOL PUBLISHING CORPORATION →2 incidents on file

Harvard Business School notified Montana residents of a security incident involving unauthorized access to files containing personal information. The breach stemmed from a vulnerability in a software vendor's system, with unauthorized downloads occurring between December 21-23, 2020. HBS patched the vulnerability, coordinated with law enforcement, and offered two years of free credit monitoring.

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Incident timeline

undetected · 8 days

discovery → filing · 13 days

Dec 21, 2020

Begins

Dec 29, 2020

Discovered

Jan 11, 2021

Filed

vs. sector median

7 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

New Hampshire State AGbd_4b4ffa1708d3e49b2021-01-15 · +4dVerified

Name: HARVARD BUSINESS SCHOOL PUBLISHING CORPORATION
norm: harvard business school publishing

Name: HARVARD BUSINESS SCHOOL PUBLISHING CORPORATION
norm: harvard business school publishing
Industry: Educationllm

Discovered: Dec 29, 2020
Breach occurred: Dec 21, 2020 – Dec 23, 2020
Undetected for: 8 daysoccurrence → discovery
Materiality determined: —
Notification sent: Jan 11, 2021
Affected individuals: 1state-resident count only
Data types: PIIIdentity (basic)
Attack vector: Third-Party / Supply Chain
MITRE ATT&CK: T1195 Supply Chain CompromiseT1190 Exploit Public-Facing ApplicationT1041 Exfiltration Over C2 Channel
Threat actor: ExternalFinancial
Regulator citations: Coordinating with local and federal law enforcement
Initial access: exploit_public_facing

During the incident: HBS promptly applied a patch supplied by the vendor to resolve the vulnerability in the vendor's software
HBS is coordinating with local and federal law enforcement to further investigate the incident
Providing a two-year membership in Experian's IdentityWorks monitoring product at no cost
Changes made: Vendor changed its anomaly detection routine to run more frequently
Vendor made other security enhancements
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 13 days(13 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 ↗

Montana State AGJan 11 · first · this page

New Hampshire State AG+4d

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/HBS-Notif.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Jan 11, 2021
Raw hash: e903b76219c8f038646a114de2f342a97aebfc7d7892989121a633b38624ee49

Linked disclosures

Regulatory filings (1) · sorted by filing gap

Reporting entityHARVARD BUSINESS SCHOOL PUBLISHING CORPORATION

Victim entityHARVARD BUSINESS SCHOOL PUBLISHING CORPORATION

Incidentdiscovered Dec 29, 2020

Stated responseHBS promptly applied a patch supplied by the vendor to resolve the vulnerability in the vendor's software

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov