Microsoft Office Remote Code Execution Vulnerability

According to the CVSS metrics, successful exploitation of this vulnerability does not impact confidentiality (C:N), or integrity (I:N), but has a high impact on availability (A:H). What does that mean for this vulnerability?
An attacker who successfully exploits this vulnerability cannot access or modify any sensitive user data but can cause user data to become unavailable.

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.

Is the Attachment Preview Pane an attack vector for this vulnerability?
Yes. The attachment Preview Pane that is accessed when a user clicks to preview an attached file is an attack vector; however, the email Preview Pane itself is not.

Security updates
16.0.5478.1000 — https://support.microsoft.com/help/5002659
16.0.10416.20026 — https://support.microsoft.com/help/5002657
https — https://docs.microsoft.com/en-us/officeupdates/microsoft365-apps-security-updates
16.92.24120731 — https://go.microsoft.com/fwlink/p/?linkid=831049
16.0.5478.1000 — https://support.microsoft.com/help/5002661