Type Confusion in Microsoft Office for macOS and Microsoft Office - CVE-2026-116922
Published: November 11, 2026
Vulnerability identifier: #VU164987
CSH Severity: Medium
CVSS v4: 6.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-116922
CWE-ID: CWE-843
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to disclose sensitive information from heap memory.
The vulnerability exists due to type confusion in Microsoft Office PowerPoint when processing specially crafted content. A remote attacker can trick a victim into viewing specially crafted PowerPoint content to potentially read small portions of heap memory.
The Preview Pane is an attack vector.
Affected software
Microsoft Office for macOS
Microsoft Office
Microsoft Office
How to mitigate CVE-2026-116922
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