Microsoft Word Remote Code Execution Vulnerability

There are multiple update packages available for some of the affected software. Do I need to install all the updates listed in the Security Updates table for the software?
Yes. Customers should apply all updates offered for the software installed on their systems. If multiple updates apply, they can be installed in any order.

Is the Preview Pane an attack vector for this vulnerability?
No, the Preview Pane is not an attack vector.

According to the CVSS metric, the attack complexity is high (AC:H). What does that mean for this vulnerability?
Successful exploitation of this vulnerability requires an attacker to win a race condition.

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.
For example, when the score indicates that the Attack Vector is Local and User Interaction is Required, this could describe an exploit in which an attacker, through social engineering, convinces a victim to download and open a specially crafted file from a website which leads to a local attack on their computer.

Security updates
16.0.5522.1000 — https://support.microsoft.com/help/5002788
16.0.5522.1000 — https://support.microsoft.com/help/5002787
16.0.10417.20059 — https://support.microsoft.com/help/5002796
16.0.10417.20059 — https://support.microsoft.com/help/5002798
https — https://docs.microsoft.com/en-us/officeupdates/microsoft365-apps-security-updates
16.102.25101223 — https://go.microsoft.com/fwlink/p/?linkid=831049
16.0.5522.1000 — https://support.microsoft.com/help/5002789