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VULNERABILITIES

CVE-2026-40364 Details

Description

Access of resource using incompatible type ('type confusion') in Microsoft Office Word allows an unauthorized attacker to execute code locally.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:8.4 HIGHVector:CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40364 [email protected]Vendor Advisory

Weakness Enumeration

CWE-IDCWE NameSource
CWE-122Heap-based Buffer Overflow[email protected]
CWE-843Access of Resource Using Incompatible Type ('Type Confusion')[email protected]
CWE-908Use of Uninitialized Resource[email protected]

Affected Products

ProductVersions
microsoft 365 apps
All versions

CPE

  • cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:x64:*
  • cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:x86:*

Remediation

  • No remediation found in references.
microsoft office
2019

CPE

  • cpe:2.3:a:microsoft:office:2019:*:*:*:*:*:x64:*
  • cpe:2.3:a:microsoft:office:2019:*:*:*:*:*:x86:*

Remediation

  • No remediation found in references.
microsoft office long term servicing channel
2021
2024

CPE

  • 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:*:*

Remediation

  • No remediation found in references.
microsoft word
2016

CPE

  • cpe:2.3:a:microsoft:word:2016:*:*:*:*:*:x64:*
  • cpe:2.3:a:microsoft:word:2016:*:*:*:*:*:x86:*

Remediation

  • No remediation found in references.

Change History

4 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-40364
NVD Published Date:
May 12, 2026
NVD Last Modified:
Jun 17, 2026
Source:
[email protected]
CVE-2026-40364 Details - Not Deferred