Question
What does EOL mean regarding cPanel/WHM?
Answer
When a release of cPanel & WHM no longer exists in any tier and reaches End of Life (EOL), it becomes unsupported. Unsupported versions do not receive security updates or bug fixes.
It is recommended that you update cPanel/WHM as soon as possible to ensure that you continue to receive security updates and bug fixes.
Resources
Understanding the update/release process and tiers
How to determine the actively supported cPanel versions?
What operating systems are supported by cPanel?