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OpenAdvisories
Critical MSRC-CVE-2026-88178 1 CVE

Microsoft Office PowerPoint Remote Code Execution Vulnerability

Published Oct 13, 2026 · Updated Oct 15, 2026 · Revision 2

Vendor: Microsoft

Summary

Impact: Remote Code Execution. Microsoft rating: Critical. Not known to be exploited — Exploitation Less Likely. Customer action: Required.

Details

Is the Preview Pane an attack vector for this vulnerability?
Yes, the Preview Pane is 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.

How could an attacker exploit this vulnerability?
An unauthenticated attacker could exploit this vulnerability by submitting a specially crafted presentation for processing by an affected Office Online service. Successful exploitation could allow the attacker to execute code on the target system. No authentication or user interaction is required.

Security updates
16.114.26101123 — https://learn.microsoft.com/en-us/officeupdates/release-notes-office-for-mac
16.0.14334.20974 — https://docs.microsoft.com/en-us/officeupdates/microsoft365-apps-security-updates
https — https://learn.microsoft.com/en-us/officeupdates/microsoft365-apps-security-updates

Vulnerabilities 1

Revision history

  1. #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.

  2. #1

    Information published.

References