Tiny MCE Vulnerablity

Hi Guys, WordPress latest version 6.7.2 comes with TinyMCE 4.9.11 version which show vulnerability issues. How to get the vulnerability issue fixed? Why WordPress is not coming with latest version of TinyMce? Can anyone help.

Vulnerable javascript library: TinyMCE
version: 4.9.11
script uri: wp-includes/js/tinymce/tinymce.min.js?ver=49110-20201110
Details:
TinyMCE 5.1.6 provides improvement in CDATA parsing and sanitization to address a cross-site scripting (XSS) vulnerability. Please refer to vendor documentation (https://www.tiny.cloud/docs/release-notes/release-notes516/) for more information.