CVE-2026-40418: Use after free in Microsoft Office allows an authorized attacker to elevate privileges locally.

PriorityP345high7.8CVSS 3.1

AVLACLPRLUINSUCHIHAH

EPSS

0.25%

16.9th percentile

Use after free in Microsoft Office allows an authorized attacker to elevate privileges locally.

Affected

7 ranges

Vendor	Product	Version range	Fixed in
microsoft	microsoft_365_apps_for_enterprise	>= 16.0.1 < https://aka.ms/OfficeSecurityReleases	https://aka.ms/OfficeSecurityReleases
microsoft	microsoft_office_2019	>= 19.0.0 < https://aka.ms/OfficeSecurityReleases	https://aka.ms/OfficeSecurityReleases
microsoft	microsoft_office_ltsc_2021	>= 16.0.1 < https://aka.ms/OfficeSecurityReleases	https://aka.ms/OfficeSecurityReleases
microsoft	microsoft_office_ltsc_2024	>= 16.0.0 < https://aka.ms/OfficeSecurityReleases	https://aka.ms/OfficeSecurityReleases
microsoft	office	—	—
microsoft	office_long_term_servicing_channel	—	—
microsoft	office_long_term_servicing_channel	—	—

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