Use-after-free in Microsoft Office for macOS and Microsoft Office - CVE-2026-108442
Published: November 5, 2026
Vulnerability identifier: #VU159362
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-2026-108442
CWE-ID: CWE-416
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary code in the victim user's context.
The vulnerability exists due to use-after-free in Microsoft Office Word when processing a specially crafted document. A remote attacker can send such a document and convince a user to open it in Word and delete a row to execute arbitrary code in the user's context.
The Preview Pane is not an attack vector for this vulnerability.
Affected software
Microsoft Office for macOS
Microsoft Office
Microsoft Office
How to mitigate CVE-2026-108442
Install security update from vendor's website.
Microsoft Office for macOS - update to 16.114 26101123
Microsoft Office - addressed in versions 16.0.14334.20974, 16.0.17932.21056
Microsoft Office - addressed in versions 16.0.14334.20974, 16.0.17932.21056