Use-after-free in Microsoft Office - CVE-2026-88144
Published: October 14, 2026
Vulnerability identifier: #VU155340
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-2026-88144
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.
The vulnerability exists due to use-after-free in Microsoft Office PowerPoint when processing malicious Office files. A remote attacker can send a specially crafted Office file and convince the victim to open it to execute arbitrary code.
The Preview Pane is also an attack vector.
Affected software
Microsoft Office
How to mitigate CVE-2026-88144
Install security update from vendor's website.
Microsoft Office - addressed in versions 16.0.14334.20974, 16.0.17932.21056