CVE-2026-40421

Published: May 12, 2026Modified: Jun 17, 2026

4.3

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

Exploitability: 2.8 / Impact: 1.4

Source: secure@microsoft.com (Secondary)

Description

Files or directories accessible to external parties in Microsoft Office Word allows an unauthorized attacker to disclose information locally.

Products: Microsoft: 365 Apps, Office, Office Long Term Servicing Channel, Word

4 products

Configuration A

10 vulnerable

Vulnerable Software	Affected Versions
Microsoft 365 Apps	All versions
Microsoft 365 Apps	All versions
Microsoft Office	Version 2019
Microsoft Office	Version 2019
Microsoft Office	Version 2024
Microsoft Office	Version 2024
Microsoft Office Long Term Servicing Channel	Version 2021
Microsoft Office Long Term Servicing Channel	Version 2021
Microsoft Word	Version 2016
Microsoft Word	Version 2016

Source: secure@microsoft.com

Vendor Advisory

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