A microcode_ctl enhancement update has been released for CentOS 7.

CentOS-announce: CEEA-2020:5450 CentOS 7 microcode_ctl Enhancement Update

CentOS Errata and Enhancement Advisory 2020:5450

Upstream details at :   https://access.redhat.com/errata/RHEA-2020:5450
The following updated files have been uploaded and are currently syncing to the mirrors: ( sha256sum Filename )

x86_64:
c39f22a6884386aa2ab755116305a2ebdc6ae0a68f0992d56e87e8772c8dc240 microcode_ctl-2.1-73.4.el7_9.x86_64.rpm

Source:
2f32fffac865fb94dd8937774f1981a0f06e847570636b8aee33e3caa5e1bb37 microcode_ctl-2.1-73.4.el7_9.src.rpm