This article confirms the Java Runtime Environment version used for the Synchronization tool (Schemus).
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Old versions of Schemus used to have the Java Runtime version (JRE) 1.8.0_25 which is known to have a certain Vulnerabilities.
The Newest version of Schemus 1.52.05 is available in the client net portal under : Dashboard > Tools > Downloads which has the latest Java Runtime version.
Note : If you need to check which Java version your Schemus is using , Go to the default installation path : C:\Program Files\Schemus\jre\bin\java.