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CVE-2026-40366

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

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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 (12)

Microsoft
4 products
365 Apps
Office
Office Long Term Servicing Channel
Word
Configuration A
12 vulnerable
Vulnerable SoftwareAffected Versions
Microsoft
365 Apps
All versions
365 Apps
All versions
Microsoft
Office
Version 2019
Office
Version 2019
Microsoft
Office Long Term Servicing Channel
Version 2021
Office Long Term Servicing Channel
Version 2021
Office Long Term Servicing Channel
Version 2021
Office Long Term Servicing Channel
Version 2024
Office Long Term Servicing Channel
Version 2024
Office Long Term Servicing Channel
Version 2024
Microsoft
Word
Version 2016
Word
Version 2016

Related CWEs

CWE-416
Use After Free
The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

References (1)

Source: secure@microsoft.com
Vendor Advisory

Timeline

No history available yet.