The only mitigation available is to uninstall QuickTime for Windows'.
Potential negative consequences include loss of confidentiality, integrity, or availability of data, as well as damage to system resources or business assets. However, using unsupported software may increase the risks from viruses and other security threats.
Computer Emergency Readiness Team: 'Computers running QuickTime for Windows will continue to work after support ends. According to the Department of Homeland Security's U.S. The main reason may lie that critical vulnerabilities that Apple has no intention of fixing which means Apple will no longer be issuing security updates for the product on the Windows Platform.
