Type Confusion in Microsoft Office for macOS - CVE-2026-64904
Published: August 12, 2026
Vulnerability identifier: #VU141947
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-2026-64904
CWE-ID: CWE-843
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 access of resource using incompatible type ('type confusion') in Microsoft Office for macOS when parsing a crafted Office file. A remote attacker can send a specially crafted Office file to execute arbitrary code.
User interaction is required to open the crafted file, and the Preview Pane is not an attack vector.
Affected software
Microsoft Office for macOS
How to mitigate CVE-2026-64904
Install security update from vendor's website.
Microsoft Office for macOS - update to 16.112.26081010