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CVE-2026-40420

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

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8.8
Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Exploitability: 2.0 / Impact: 6.0
Source: secure@microsoft.com (Secondary)

Description

Use after free in Microsoft Office allows an authorized attacker to elevate privileges locally.

Affected (8)

Microsoft
3 products
365 Apps
Office
Office Long Term Servicing Channel
Configuration A
8 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 2024
Office Long Term Servicing Channel
Version 2024

Related CWEs

CWE-284
Improper Access Control
The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.

References (1)

Source: secure@microsoft.com
Vendor Advisory

Timeline

No history available yet.