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CVE Vulnerability Details :
CVE-2026-40363
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 | 16:58
Updated At-12 May, 2026 | 17:53
Rejected At-
▼CVE Numbering Authority (CNA)
Microsoft Office Remote Code Execution Vulnerability

Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code 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 2016
Platforms
  • 32-bit Systems
  • x64-based Systems
Versions
Affected
  • From 16.0.0 before 16.0.5552.1000 (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 for Android
Versions
Affected
  • From 16.0.1 before 16.0.19822.20190 (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)
Vendor
Microsoft CorporationMicrosoft
Product
Microsoft Office LTSC for Mac 2021
Versions
Affected
  • From 16.0.1 before 16.109.26051019 (custom)
Vendor
Microsoft CorporationMicrosoft
Product
Microsoft Office LTSC for Mac 2024
Versions
Affected
  • From 16.0.0 before 16.109.26051019 (custom)
Problem Types
TypeCWE IDDescription
CWECWE-122CWE-122: Heap-based Buffer Overflow
Type: CWE
CWE ID: CWE-122
Description: CWE-122: Heap-based Buffer Overflow
Metrics
VersionBase scoreBase severityVector
3.18.4HIGH
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Version: 3.1
Base score: 8.4
Base severity: HIGH
Vector:
CVSS:3.1/AV:L/AC:L/PR:N/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-2026-40363
vendor-advisory
patch
Hyperlink: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40363
Resource:
vendor-advisory
patch
Details not found