Microsoft Office Security Feature Bypass 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.

What kind of security feature could be bypassed by successfully exploiting this vulnerability?
The attacker would be able to bypass the protection in Outlook that prevents a potentially dangerous extension from being uploaded and downloaded.

According to the CVSS metrics, successful exploitation of this vulnerability could lead to no loss of confidentiality (C:N), with minor loss of integrity (I:N) and availability (A:L). What does that mean for this vulnerability?
While we cannot rule out the impact to Confidentiality, Integrity, and Availability, the ability to exploit this vulnerability by itself is limited. An attacker would need to combine this with other vulnerabilities to perform an attack.

Security updates
https — https://docs.microsoft.com/en-us/officeupdates/microsoft365-apps-security-updates
16.77.23091003 — https://go.microsoft.com/fwlink/p/?linkid=831049
16.0.5413.1000 — https://support.microsoft.com/help/5002457
15.0.5589.1000 — https://support.microsoft.com/help/5002477