Command injection in Microsoft 365 Apps for Enterprise - CVE-2026-97781
Published: October 14, 2026 / Updated: October 14, 2026
Vulnerability identifier: #VU155603
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-2026-97781
CWE-ID: CWE-77
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 command injection in Microsoft Office OneNote when processing specially crafted OneNote links. A remote attacker can send a specially crafted OneNote link and convince a user to open it to execute arbitrary code.
The link can cause OneNote to launch an attacker-controlled external target.
Affected software
Microsoft 365 Apps for Enterprise
How to mitigate CVE-2026-97781
Install security update from vendor's website.
Microsoft 365 Apps for Enterprise - addressed in versions 16.0.20228.20274, 16.0.20228.20276, 16.0.20326.20230, 16.0.20326.20232, 16.0.20430.20178, 16.0.20430.20180, 16.0.20430.20182