CVE-2026-63529: Out-of-bounds read in Microsoft Office allows an unauthorized attacker to disclose information locally.

PriorityP426medium5.5CVSS 3.1

AVLACLPRNUIRSUCHINAN

EPSS

0.34%

27.7th percentile

Out-of-bounds read in Microsoft Office allows an unauthorized attacker to disclose information locally.

Affected

5 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_2016	>= 16.0.0 < 16.0.5565.1001	16.0.5565.1001
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

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