THREAT OPS › Threat News › [Breach] McGraw Hill — 13,500,136 accounts exposed
[Breach] McGraw Hill — 13,500,136 accounts exposed
Breached service: McGraw Hill Domain: mheducation.com Accounts exposed: 13,500,136 Breach date: 2026-04-10 Added to HIBP: 2026-04-16T01:31:14Z Data classes leaked: Email addresses, Names, Phone numbers, Physical addresses Description: In April 2026, education company McGraw Hill confirmed a data breach following an extortion attempt. Attributed to a Salesforce misconfiguration, the company stated
MITRE ATT&CK techniques
- Email AddressesT1589.002
Indicators of compromise
- mheducation.comdomain
Original source: https://haveibeenpwned.com/PwnedWebsites#McGrawHill