CVE-2026-63525: Numeric truncation error in Microsoft Office Word allows an unauthorized attacker to execute code locally.

PriorityP344high7.8CVSS 3.1

AVLACLPRNUIRSUCHIHAH

EPSS

0.38%

30.8th percentile

Numeric truncation error in Microsoft Office Word allows an unauthorized attacker to execute code locally.

Affected

6 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	microsoft_word_2016	>= 16.0.1 < 16.0.5565.1000	16.0.5565.1000
microsoft	word	—	—

Stop checking back — get the weekly exploitation signal.

Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.