Heap-based buffer overflow in Microsoft Office for macOS and Microsoft Office - CVE-2026-120001
Published: November 11, 2026
Vulnerability identifier: #VU165409
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-2026-120001
CWE-ID: CWE-122
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary code in the context of the victim user.
The vulnerability exists due to a heap-based buffer overflow in Microsoft Office PowerPoint when processing a specially crafted audio file. A remote attacker can convince a user to import the crafted audio file into PowerPoint to execute arbitrary code in that user's context.
The Preview Pane is also an attack vector.
Affected software
Microsoft Office for macOS
Microsoft Office
Microsoft Office
How to mitigate CVE-2026-120001
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