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OpenAdvisories
High MSRC-CVE-2026-97743 1 CVE

Microsoft Office Excel Information Disclosure Vulnerability

Published Oct 13, 2026 · Updated Nov 10, 2026 · Revision 4

Vendor: Microsoft

Summary

Impact: Information Disclosure. Microsoft rating: Important. Not known to be exploited — Exploitation Less Likely. Customer action: Required.

Details

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

Are the updates for Microsoft Office LTSC for Mac 2021 and 2024 currently available?
Yes. As of October 15, 2025, the security update for Microsoft Office LTSC for Mac 2021, 2024 and Microsoft Office 365 for Mac are available. Customers running Microsoft Office LTSC for Mac 2021, 2024 and Microsoft Office 365 for Mac should ensure the update is installed to be protected from this vulnerability.

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.

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

Security updates
https — https://learn.microsoft.com/en-us/officeupdates/microsoft365-apps-security-updates
16.114.26101123 — https://learn.microsoft.com/en-us/officeupdates/release-notes-office-for-mac

Vulnerabilities 1

Revision history

  1. #4

    Updated an acknowledgement. This is an informational change only.

  2. #3

    Updated an acknowledgement. This is an informational change only.

  3. #2

    Microsoft is announcing the availability of the security updates for Microsoft Office for Mac. Customers running affected Mac software should install the update for their product to be protected from this vulnerability. Customers running other Microsoft Office software do not need to take any action. See the [Release Notes](https://go.microsoft.com/fwlink/p/?linkid=831049) for more information and download links.

  4. #1

    Information published.

References