UnknownOtherGovernment IDMedium

Madison Square Garden Entertainment Corp.

bd_02be98701ea33a0f · schema v1 · pii pii-v2

Severity

Medium

Discovered

Dec 16, 2025

Filed

Feb 1, 2026

To disclose

—

Affected

Withheld by the regulator

Linked

4 filings

Confidence

95%

Full breach record for Madison Square Garden Entertainment Corp. →5 incidents on file

MADISON SQUARE GARDEN ENTERTAINMENT CORP. filed a data-breach notice with the Illinois Attorney General in February 2026 (case 26-02-1011). The register records the breach as discovered on December 16, 2025. Personal information types reported: ssn. Illinois does not publish the number of people affected — 815 ILCS 530/10 permits the Attorney General to publish only the entity name, the types of personal information and the date range.

J jump to incidentP pin to compareR raw source

Leak gap clock⏱ Leak >30d

⚠ AG web formThe discovery date came from the AG web-form field, which is systematically later than the detection date stated in the letter. Treat the clock as indicative.

Incident timeline

Dec 16, 2025

Discovered

Feb 1, 2026

Filed

This filing is one of 4 about the same incident.View merged incident

A leak claim by cl0p about this victim predates this filing by 72 days.View originating leak claim

Linked disclosures

Why this link?

Ransomware claims (1)

Leak Sitecl0pbd_66b8b6b5e23d3e102025-11-21 · +72dVerified

Regulatory filings (2) · sorted by filing gap

Maine State AGbd_eaa3e48a101e29362026-02-26 · +25dVerified
Massachusetts State AGbd_592875e108e76ee72025-08-20 · +165dVerified by operator

Name: Madison Square Garden Entertainment Corp.
norm: madison square garden entertainment
Domain: msgentertainment.com

Name: Madison Square Garden Entertainment Corp.
norm: madison square garden entertainment
Domain: msgentertainment.com
Industry: Otherllm

Discovered: Dec 16, 2025
Materiality determined: —
Notification sent: —
Affected individuals: Withheld by the regulator
Data types: Government ID
Data elements: Social Security number
Attack vector: Unknown

Compliance flags: Leak >30d
Discovery-date grounding: AG web formThe discovery date came from the AG web-form field, which is systematically later than the detection date stated in the letter. Treat the clock as indicative.

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 3 filings · 3 states

View merged incident ↗

Massachusetts State AGAug 20 · first

Illinois State AG+165d · this page

Maine State AG+190d

Pattern: first filing Aug 20 (MA), last Feb 26 (ME) — a 190-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://databreachnoticetoattorneygeneral.illinoisattorneygeneral.gov/
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Feb 1, 2026
Raw hash: 9a7975cc3cce32f082f3ec8dba897eb7f8a3f92f17e34058ea3ca22f4daf1482

Linked disclosures

Ransomware claims (1)

Regulatory filings (2) · sorted by filing gap

Reporting entityMadison Square Garden Entertainment Corp.

Victim entityMadison Square Garden Entertainment Corp.

Incidentdiscovered Dec 16, 2025

ComplianceLeak >30d

Extraction provenanceno artifact recorded

Source provenancedatabreachnoticetoattorneygeneral.illinoisattorneygeneral.gov