CVE-2026-97772: Microsoft Office Excel Remote Code Execution Vulnerability

Overview

Severity

High (CVSS 8.8)

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

Category

Remote Code Execution

Exploit Status

Not Exploited

Exploitation Likelihood

Less Likely

Patch Tuesday

2026-Oct

Released

2026-10-13

Description

Double free in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.

FAQ

Is the Preview Pane an attack vector for this vulnerability? No, the Preview Pane is not an attack vector. Are the updates for the Microsoft Office LTSC for Mac currently available? The security update for Microsoft Office LTSC for Mac 2021 and 2024 are not immediately available. The updates will be released as soon as possible, and when they are available, customers will be notified via a revision to this CVE information. 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.

Affected Products (10)

Microsoft Office

• Office Online Server
• Microsoft Office 365 for Mac
• Microsoft Office LTSC for Mac 2021
• Microsoft Office LTSC for Mac 2024
• Microsoft Office LTSC 2021 for 64-bit editions
• Microsoft Office LTSC 2021 for 32-bit editions
• Microsoft Office LTSC 2024 for 64-bit editions
• Microsoft 365 Apps for Enterprise for 64-bit Systems
• Microsoft 365 Apps for Enterprise for 32-bit Systems
• Microsoft Office LTSC 2024 for 32-bit editions

Security Updates (1)

• 5002928

Acknowledgments

0ccbbf129444eb66344ccafb92b00df4

Revision History

• 2026-10-13: Information published.