cPanel & WHM version 58 has reached End of Life and will no longer be supported by cPanel except when upgrading to a supported version.
In accordance with our EOL policy (https://go.cpanel.com/longtermsupport), 58 will continue functioning on servers where it is already installed. The last release of cPanel & WHM version 58, 58.0.52, will remain on our mirrors indefinitely. However, no further updates, such as security fixes and installations, will be provided for version 58. Older releases of cPanel & WHM version 58 will be removed from our mirrors.
Additionally, this is a reminder that v62 will be the only LTS version of 2017, and that v64 will reach End of Life as v66 hits the STABLE tier. For more information, see the cPanel blog post from last year about the LTS changes: https://blog.cpanel.com/cpanels-tiered-update-system-new-plans-for-the-lts-tier/
We recommend that all customers migrate any existing installations of cPanel & WHM version 58 or version 64 to the most recent version of cPanel & WHM 66, which you can read about on https://releases.cpanel.com.
If your server setup complicates the process of migrating to a newer version of cPanel & WHM (an upgrade blocker list is available at https://go.cpanel.com/blockers), then cPanel is here to help. Simply open a support ticket at https://tickets.cpanel.net/submit so that our knowledgeable support team can provide recommendations, migration assistance, and more.
For the PGP-signed message, see 58 EOL Now Month-signed.