The CentOS project has announced a new update to the distribution, releasing CentOS 7.9 which is derived from Red Hat Enterprise Linux 7.9. You can also use this tutorial to upgrade your CentOS 7 to the latest version.
CentOS 7 Download Links
Use the following links to download the latest CentOS 7.9 ISO images from CentOS official download page or its mirror pages. A torrent link is also available for all ISO images to download images using the torrent software.
CentOS-7-x86_64-DVD-2009.iso [4.3G] CentOS-7-x86_64-Everything-2009.iso [10G] CentOS-7-x86_64-LiveGNOME-2009.iso [1.4G] CentOS-7-x86_64-LiveKDE-2009.iso [1.8G] CentOS-7-x86_64-Minimal-2009.iso [918M] CentOS-7-x86_64-NetInstall-2009.iso [507M]
All the above links are linked to the official download page. The are not a direct download links. The above link will redirect your to the download mirrors list page. Where you can download images from your nearest mirror servers.