A libexif security update has been released for CentOS 7.

CentOS-announce: CESA-2020:2549 Moderate CentOS 7 libexif Security Update

CentOS Errata and Security Advisory 2020:2549 Moderate

Upstream details at : https://access.redhat.com/errata/RHSA-2020:2549

The following updated files have been uploaded and are currently
syncing to the mirrors: ( sha256sum Filename )

x86_64:
ff151ff0d06a3a237f4112e81dd69cb30bdd207c1ce2eeb5c88d405e20445e69 libexif-0.6.21-7.el7_8.i686.rpm
4ca77ed3d5488bddf31a813f9371f5487353f38a4d4fe7b38be4b46694f3e848 libexif-0.6.21-7.el7_8.x86_64.rpm
73a55735154caaf123f7c2629028bca3814feea738608d640925ec8547daedd0 libexif-devel-0.6.21-7.el7_8.i686.rpm
186ce67dec961f8d780c8d13e7155bc248bcc8287aa243db6203a96edec4350b libexif-devel-0.6.21-7.el7_8.x86_64.rpm
d3c72ed4324f614b0ed32dfcae0b76adb75317301ed01a759168c17e6c4f9427 libexif-doc-0.6.21-7.el7_8.x86_64.rpm

Source:
9740fa364a4cb8a7ee5f1dedb9cc96917b316acbc157374e3f8c8bcab9ed354e libexif-0.6.21-7.el7_8.src.rpm