The Heartbleed bug allows hackers to access computer systems using OpenSSL encryption software without leaving a trace.
The hackers used stolen employee credentials to log into the network. They then hacked into a database where they were able to steal the records, according to the report.
The CHS data breach is the largest known cyberattack using Heartbleed, according to the report.
More articles on data breaches:
Data breach affects Children’s Mercy Hospital employees
Mother sues Rady Children’s following security breach
Tri-City Medical Center reports data breach affecting 35k patients
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