SB2026101479 - Remote code execution in Microsoft Office OneNote

Description

This security bulletin contains information about 1 vulnerability.

1) Command injection (CVE-ID: CVE-2026-97781)

CWE-ID: CWE-77 - Command injection

CVSSv4: 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]

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.

Remediation

Install update from vendor's website.

References

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2026-97781
• https://learn.microsoft.com/en-us/officeupdates/microsoft365-apps-security-updates