Use-after-free in Microsoft 365 Apps for Enterprise - CVE-2026-80081
Published: September 9, 2026
Vulnerability identifier: #VU148253
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-2026-80081
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 a specially crafted PowerPoint presentation containing malicious linked media. A remote attacker can send a specially crafted PowerPoint presentation to a target user to execute arbitrary code.
The victim must open the presentation, start the slideshow, and allow the linked content; the Preview Pane is not an attack vector.
Affected software
Microsoft 365 Apps for Enterprise
How to mitigate CVE-2026-80081
Install security update from vendor's website.
Microsoft 365 Apps for Enterprise - update to 16.0.20326.20138