Use-after-free in Microsoft Office for macOS and Microsoft Office - CVE-2026-112734
Published: November 11, 2026
Vulnerability identifier: #VU164828
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-2026-112734
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 with the victim user's permissions.
The vulnerability exists due to use-after-free in Microsoft Office PowerPoint when processing specially crafted presentations. A remote attacker can provide a specially crafted PowerPoint presentation and convince a user to open it for editing and promote selected paragraphs in Outline View to execute arbitrary code with that user's permissions.
The Preview Pane is also an attack vector.
Affected software
Microsoft Office for macOS
Microsoft Office
Microsoft Office
How to mitigate CVE-2026-112734
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
Microsoft Office - addressed in versions 16.0.14334.21048, 16.0.17932.21140