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CVE Vulnerability Details :
CVE-2026-40418
PUBLISHED
More InfoOfficial Page
Assigner-microsoft
Assigner Org ID-f38d906d-7342-40ea-92c1-6c4a2c6478c8
View Known Exploited Vulnerability (KEV) details
Published At-12 May, 2026 | 16:59
Updated At-13 May, 2026 | 03:56
Rejected At-
▼CVE Numbering Authority (CNA)
Microsoft Office Click-To-Run Elevation of Privilege Vulnerability

Use after free in Microsoft Office Click-To-Run allows an authorized attacker to elevate privileges locally.

Affected Products
Vendor
Microsoft CorporationMicrosoft
Product
Microsoft 365 Apps for Enterprise
Platforms
  • 32-bit Systems
  • x64-based Systems
Versions
Affected
  • From 16.0.1 before https://aka.ms/OfficeSecurityReleases (custom)
Vendor
Microsoft CorporationMicrosoft
Product
Microsoft Office 2019
Platforms
  • 32-bit Systems
  • x64-based Systems
Versions
Affected
  • From 19.0.0 before https://aka.ms/OfficeSecurityReleases (custom)
Vendor
Microsoft CorporationMicrosoft
Product
Microsoft Office LTSC 2021
Platforms
  • 32-bit Systems
  • x64-based Systems
Versions
Affected
  • From 16.0.1 before https://aka.ms/OfficeSecurityReleases (custom)
Vendor
Microsoft CorporationMicrosoft
Product
Microsoft Office LTSC 2024
Platforms
  • 32-bit Systems
  • x64-based Systems
Versions
Affected
  • From 16.0.0 before https://aka.ms/OfficeSecurityReleases (custom)
Problem Types
TypeCWE IDDescription
CWECWE-416CWE-416: Use After Free
Type: CWE
CWE ID: CWE-416
Description: CWE-416: Use After Free
Metrics
VersionBase scoreBase severityVector
3.17.8HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Version: 3.1
Base score: 7.8
Base severity: HIGH
Vector:
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40418
vendor-advisory
patch
Hyperlink: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40418
Resource:
vendor-advisory
patch
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
Details not found