Microsoft Excel Information Disclosure Vulnerability

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

According to the CVSS metrics, exploitation results in a small loss of confidentiality (C:L), no integrity impact (I:N), and high availability impact (A:H). What does this mean?
This means that an attacker could potentially see a small amount of information they should not have access to, but they cannot change data or system settings. The primary impact is that the affected service could stop working or crash, which may temporarily disrupt normal system operations.

What type of information could be disclosed by this vulnerability?
An attacker who successfully exploited this vulnerability could potentially read small portions of heap memory.

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

Security updates
16.111.26071215 — https://www.microsoft.com/en-us/microsoft-365/mac/microsoft-365-for-mac?msockid=35f9adb0e74b61392038b90de6fe608c
16.0.10417.20175 — https://support.microsoft.com/help/5002884
https — https://docs.microsoft.com/en-us/officeupdates/microsoft365-apps-security-updates
16.111.26071215 — https://go.microsoft.com/fwlink/p/?linkid=831049
16.0.5561.1001 — https://support.microsoft.com/help/5002877