How to update Wordpress script core from CPanel?

i recently started a wordpress blog but after a while a new wordpress version update ( core update ) came out but i can't update it from admin panel inside wordpress ... So how can update it manualy from cpanel ?
i have a major issue with writing permissions ( 777 ) .?

backup your all database (on phpmyadmin) and make a clear new set up.it should work.But dont forget to make a full backup before doing someting.

or try softaculus updater if your providers supports ofcourse

You’ll have to overwrite the old WordPress core files – wp-admin and wp-includes – with the new ones. We’re going to show you how to do just that using FileZilla:

1. Download the
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   of WordPress and
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   on your computer.
2. Access the extracted folder and delete the wp-config-sample.php file and wp-content folder to avoid losing any important data in the process.
3. Connect and log in to your WordPress site via FileZilla or your preferred FTP client. Check
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   if this is your first time using an FTP client.
4. Find the existing web host wp-admin and wp-includes directories on the right side of the panel (remote site), then right-click to Delete them.
5. On the left side of the panel (local site), select the new wp-admin and wp-includes folder, then select Upload.
6. Upload the rest of the WordPress unzipped files from your computer to the web host directory. Overwrite the old files by uploading new ones to the server. When a confirmation “Target file already exists” screen appears, make sure the “Always use this action” and “Apply to current queue only” options are selected.
7. When the files are all uploaded, go to yoursite.com/wp-admin/upgrade.php/ to check if you’ve successfully updated your website to the new version of WordPress.

IMPORTANT: Don’t rush to replace everything inside the WordPress root directory. You can easily break your site if you do something incorrectly, so make sure to follow the tutorial carefully.