norm: cornerstoneUSno LEI · no CIKMax severity: Medium

Canonical registry

Cornerstone

ent_bac367c12c2146176b56536e

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Disclosures

1

HHS OCR · 1 jurisdiction

Multi-filing incidents

—

no multi-filing incident in sample

Max affected reported

14,830

as filed · HHS OCR ME

Leak-site claims

0

none in sample

Identity resolution

Canonical name: Cornerstone
Normalized: cornerstone— dedupe via name-norm; Microsoft / MSFT collapse to one row
GLEIF LEI: No match
SEC EDGAR CIK: None — not an SEC registrant
Domain: online.cornerstone.edu

Disclosure history (1)newest first

MAINEHHS OCRas victim2026-07-27
Cornerstone Behavioral Healthcare, a Maine-based healthcare provider, reported a hacking/IT incident affecting 14,830 individuals. The breach involved unauthorized access to a network server. No business associate was involved. The filing was submitted to the Maine Office of the Attorney General on July 27, 2026.