CVE-2026-40367

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

8.4

Vector

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

Exploitability: 2.5 / Impact: 5.9

Source: secure@microsoft.com (Secondary)

Description

Access of resource using incompatible type ('type confusion') in Microsoft Office Word allows an unauthorized attacker to execute code locally.

Affected (15)

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

5 products

Office Long Term Servicing Channel

Sharepoint Server

Configuration A

15 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 Long Term Servicing Channel	Version 2021
Microsoft Office Long Term Servicing Channel	Version 2021
Microsoft Office Long Term Servicing Channel	Version 2021
Microsoft Office Long Term Servicing Channel	Version 2024
Microsoft Office Long Term Servicing Channel	Version 2024
Microsoft Office Long Term Servicing Channel	Version 2024
Microsoft Sharepoint Server	Before 16.0.19725.20280
Microsoft Sharepoint Server	Version 2016
Microsoft Sharepoint Server	Version 2019
Microsoft Word	Version 2016
Microsoft Word	Version 2016

Related CWEs

Untrusted Pointer Dereference

The product obtains a value from an untrusted source, converts this value to a pointer, and dereferences the resulting pointer.

References (1)

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40367

Source: secure@microsoft.com

Vendor Advisory

Timeline

No history available yet.