DisclosureLens
UnknownTelecom & MediaInformationCustomer Data InvolvedIdentity (basic)Government IDMedium

Madison Square Garden Entertainment Corp.

bd_b6c209f6588cd0db · schema v1 · pii pii-v1

Severity

Medium

Discovered

—

Filed

Feb 26, 2026

To disclose

—

Affected

Not disclosed

Linked

4 filings

Confidence

67%
Full breach record for Madison Square Garden Entertainment Corp. →5 incidents on file

Madison Square Garden Entertainment Corp notified Massachusetts residents of a data security incident involving their name and Social Security number. The notice, dated February 23, 2026, offers two years of complimentary credit monitoring via Cyberscout. The specific cause, dates of occurrence, or number of affected individuals are not disclosed in the letter.

Leak gap clock⏱ Leak >90d
⚠ no discovery dateNo discovery date was extracted, so no notification clock can be evaluated.

Incident timeline — partial

? — ?

Breach window unknown

Feb 26, 2026

Filed

—

Corroborated · see linked filings

Compliance clocks stay unassessable until a regulatory filing lands. Dashed segments fill in automatically when corroboration arrives.

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 97 days.View originating leak claim

Linked disclosures

Why this link?

Regulatory filings (3) · sorted by filing gap

Filing propagation · 4 filings · 4 states

View merged incident ↗
Indiana State AGFeb 26 · first
New Hampshire State AGFeb 26 · first
Nebraska State AGFeb 26 · first
Massachusetts State AGFeb 26 · first · 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.