ASRock is aware that the current Intel® microcode version might be defected by security vulnerabilities, we are working closely with Intel® to fix and update new BIOS for ASRock 100/200/Z370/X299 series motherboards.
We recommend users update their systems by flashing the latest BIOS as soon as the relevant revision for your motherboard is available, please refer to below links for more info.
Intel® Security Center : https://security-center.intel.com/advisory.aspx?intelid=INTEL-SA-00088&languageid=en-fr
BIOS Update for ASRock Motherboards (Updating in progress) http://www.asrock.com/Microsite/SA00088/
Latest BIOS Update : http://www.asrock.com/support/index.asp?cat=BIOS