CVE-2026-40367

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-40367
Access of resource using incompatible type ('type confusion') in Microsoft Office Word allows an unauthorized attacker to execute code locally.

8.4 /10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 2.5 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40367 Vendor Advisory
Configurations

Configuration 1 (hide)

OR cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:x64:*
cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:x86:*
cpe:2.3:a:microsoft:office:2019:*:*:*:*:*:x64:*
cpe:2.3:a:microsoft:office:2019:*:*:*:*:*:x86:*
cpe:2.3:a:microsoft:office_long_term_servicing_channel:2021:*:*:*:*:-:x64:*
cpe:2.3:a:microsoft:office_long_term_servicing_channel:2021:*:*:*:*:-:x86:*
cpe:2.3:a:microsoft:office_long_term_servicing_channel:2021:*:*:*:*:macos:*:*
cpe:2.3:a:microsoft:office_long_term_servicing_channel:2024:*:*:*:*:-:x64:*
cpe:2.3:a:microsoft:office_long_term_servicing_channel:2024:*:*:*:*:-:x86:*
cpe:2.3:a:microsoft:office_long_term_servicing_channel:2024:*:*:*:*:macos:*:*
cpe:2.3:a:microsoft:sharepoint_server:*:*:*:*:subscription:*:*:*
cpe:2.3:a:microsoft:sharepoint_server:2016:*:*:*:enterprise:*:*:*
cpe:2.3:a:microsoft:sharepoint_server:2019:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:word:2016:*:*:*:*:*:x64:*
cpe:2.3:a:microsoft:word:2016:*:*:*:*:*:x86:*
History

01 Jun 2026, 19:16

Type Values Removed Values Added
Summary (en) Untrusted pointer dereference in Microsoft Office Word allows an unauthorized attacker to execute code locally. (en) Access of resource using incompatible type ('type confusion') in Microsoft Office Word allows an unauthorized attacker to execute code locally.

21 May 2026, 00:16

Type Values Removed Values Added
CVSS v2 : unknown
v3 : 7.8 		v2 : unknown
v3 : 8.4

20 May 2026, 14:16

Type Values Removed Values Added
CVSS v2 : unknown
v3 : 8.4 		v2 : unknown
v3 : 7.8

19 May 2026, 18:05

Type Values Removed Values Added
CPE cpe:2.3:a:microsoft:sharepoint_server:2019:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:sharepoint_server:2016:*:*:*:enterprise:*:*:*
cpe:2.3:a:microsoft:office_long_term_servicing_channel:2021:*:*:*:*:-:x64:*
cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:x64:*
cpe:2.3:a:microsoft:sharepoint_server:*:*:*:*:subscription:*:*:*
cpe:2.3:a:microsoft:office_long_term_servicing_channel:2024:*:*:*:*:-:x64:*
cpe:2.3:a:microsoft:office:2019:*:*:*:*:*:x64:*
cpe:2.3:a:microsoft:office_long_term_servicing_channel:2021:*:*:*:*:-:x86:*
cpe:2.3:a:microsoft:office:2019:*:*:*:*:*:x86:*
cpe:2.3:a:microsoft:office_long_term_servicing_channel:2024:*:*:*:*:-:x86:*
cpe:2.3:a:microsoft:word:2016:*:*:*:*:*:x64:*
cpe:2.3:a:microsoft:office_long_term_servicing_channel:2024:*:*:*:*:macos:*:*
cpe:2.3:a:microsoft:word:2016:*:*:*:*:*:x86:*
cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:x86:*
cpe:2.3:a:microsoft:office_long_term_servicing_channel:2021:*:*:*:*:macos:*:*
References () https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40367 - () https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40367 - Vendor Advisory
First Time Microsoft
Microsoft word
Microsoft office Long Term Servicing Channel
Microsoft 365 Apps
Microsoft office
Microsoft sharepoint Server

12 May 2026, 18:17

Type Values Removed Values Added
New CVE
Information

Published : 2026-05-12 18:17

Updated : 2026-06-01 19:16

NVD link : CVE-2026-40367

Mitre link : CVE-2026-40367

CVE.ORG link : CVE-2026-40367

JSON object : View

Products Affected

microsoft

  • office
  • sharepoint_server
  • 365_apps
  • office_long_term_servicing_channel
  • word
CWE
CWE-822

Untrusted Pointer Dereference