Main Vulnerability Database Vulnerabilities #VU165103

Double free in Microsoft Office for macOS and Microsoft Office - CVE-2026-118702

Published: November 11, 2026

Vulnerability identifier: #VU165103

CSH Severity: High

CVSS v4: 8.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-118702

CWE-ID: CWE-415

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to execute arbitrary code.

The vulnerability exists due to a double free in Microsoft Office Excel when processing a specially crafted file. A remote attacker can trick a user into opening the crafted file to execute arbitrary code.

The Preview Pane is not an attack vector for this vulnerability.

Affected software

Microsoft Office for macOS
Microsoft Office

How to mitigate CVE-2026-118702

Install security update from vendor's website.

Microsoft Office for macOS - update to 16.115.26110837
Microsoft Office - addressed in versions 16.0.14334.21048, 16.0.17932.21140

External References

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2026-118702

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