McGraw Hill
HighMcGraw Hill suffered a data breach in April 2026, exposing 13.5M records, including personal contact details.
- Records exposed
- 13,500,136 records
- Breach date
- Breach Apr 10, 2026
- Last update
- Updated Apr 16, 2026
What data was exposed?
Fields reported as compromised in this breach record.
Why does this breach matter?
In-depth analysis of the breach and its implications.
In April 2026, McGraw Hill experienced a significant security event wherein unauthorized access to data hosted on its Salesforce platform occurred due to a configuration error. An initial extortion attempt was linked to the breach, which culminated in the public distribution of over 100GB of sensitive data. The exposed dataset included information of 13.5 million individuals, such as email addresses, names, physical addresses, and phone numbers.
Impact Analysis
Understanding the scope and consequences of this breach.
- User Impact
- Individuals may face increased risk of phishing or other fraudulent communications leveraging their leaked contact details.
- Business Impact
- McGraw Hill faces reputational damage, potential financial penalties, and a need to enhance their data protection measures.
- Affected Sectors
- Education
- Publishing
- Geographic Impact
- Global
What You Should Do
Recommended actions to take in response to this breach.
If You Were Affected
- •Users should monitor email and communication channels for phishing attempts.
- •Review credit card statements and report suspicious activities.
- •Ensure strong, unique passwords for all accounts.
Preventive Measures
- •Implement routine system audits to identify misconfigurations.
- •Securely configure cloud platforms by following best practices.
- •Educate staff on secure data management protocols.
Frequently Asked Questions
Common questions about this breach and what it means for you.