CVE-2026-40359

high Microsoft
CVSS v3 Base Score
7.8
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Attack Characteristics
Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Published: May 12, 2026 (1 days ago)
Last Modified: May 13, 2026
Vendor: Microsoft
Source: MITRE

Description

Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

CWE

CWE-416

Affected Products

Microsoft Microsoft 365 Apps for EnterpriseMicrosoft Microsoft Excel 2016Microsoft Microsoft Office 2019Microsoft Microsoft Office LTSC 2021Microsoft Microsoft Office LTSC 2024Microsoft Microsoft Office LTSC for Mac 2021Microsoft Microsoft Office LTSC for Mac 2024Microsoft Office Online Server

References

🔗 msrc.microsoft.com