Microsoft Excel Remote Code Execution Vulnerability

According to the CVSS metric, user interaction is required (UI:R). What interaction would the user have to do?
An attacker must send the user a malicious file and convince them to open it.

According to the CVSS metric, the attack vector is local (AV:L). Why does the CVE title indicate that this is a remote code execution?
The word Remote in the title refers to the location of the attacker. This type of exploit is sometimes referred to as Arbitrary Code Execution (ACE). The attack itself is carried out locally. This means an attacker or victim needs to execute code from the local machine to exploit the vulnerability.

Are the updates for the Microsoft Office 2021 for Mac currently available?
The security update for Microsoft Office 2021 for Mac is not immediately available. The update will be released as soon as possible, and when it is available, customers will be notified via a revision to this CVE information.

Security updates
https — https://docs.microsoft.com/en-us/officeupdates/office365-proplus-security-updates
16.84.24041420 — https://go.microsoft.com/fwlink/p/?linkid=831049