CVE-2026-40364

CVE Enrichment

CVSS: 8.4 HIGH
EPSS: 4.42%
EPSS Percentile: 91.37%
CISA KEV: Not listed

Description

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

Technical Details

CVSS Version: 3.1
CNA / NVD Source: [email protected]
Published: 13-May-2026 01:17
Last Modified: 27-Oct-2026 01:10
EPSS Date: 2026-11-03
CWE: CWE-122, CWE-843, CWE-908

CVSS Vector


            CVSS:3.1                            AV:L /
                            AC:L /
                            PR:N /
                            UI:N /
                            S:U /
                            C:H /
                            I:H /
                            A:H

CNA Products / Version Status

Microsoft · Microsoft 365 Apps for Enterprise Source: CNA · [email protected]
Default status: unknown

16.0.1 ≤ version < https://aka.ms/OfficeSecurityReleases — affected (custom)

Platforms: 32-bit Systems, x64-based Systems
Microsoft · Microsoft Office 2019 Source: CNA · [email protected]
Default status: unknown

19.0.0 ≤ version < https://aka.ms/OfficeSecurityReleases — affected (custom)

Platforms: 32-bit Systems, x64-based Systems
Microsoft · Microsoft Office LTSC 2021 Source: CNA · [email protected]
Default status: unknown

16.0.1 ≤ version < https://aka.ms/OfficeSecurityReleases — affected (custom)

Platforms: 32-bit Systems, x64-based Systems
Microsoft · Microsoft Office LTSC 2024 Source: CNA · [email protected]
Default status: unknown

16.0.0 ≤ version < https://aka.ms/OfficeSecurityReleases — affected (custom)

Platforms: 32-bit Systems, x64-based Systems
Microsoft · Microsoft Office LTSC for Mac 2021 Source: CNA · [email protected]
Default status: unknown

16.0.1 ≤ version < 16.109.26051019 — affected (custom)
Microsoft · Microsoft Office LTSC for Mac 2024 Source: CNA · [email protected]
Default status: unknown

16.0.0 ≤ version < 16.109.26051019 — affected (custom)
Microsoft · Microsoft Word 2016 Source: CNA · [email protected]
Default status: unknown

16.0.1 ≤ version < 16.0.5552.1000 — affected (custom)

Platforms: 32-bit Systems, x64-based Systems

Affected Products / Versions

microsoft / 365_apps Source: NVD CPE · affected
Version / affected range: -
cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:x64:*
microsoft / 365_apps Source: NVD CPE · affected
Version / affected range: -
cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:x86:*
microsoft / office Source: NVD CPE · affected
Version / affected range: 2019
cpe:2.3:a:microsoft:office:2019:*:*:*:*:*:x64:*
microsoft / office Source: NVD CPE · affected
Version / affected range: 2019
cpe:2.3:a:microsoft:office:2019:*:*:*:*:*:x86:*
microsoft / office_long_term_servicing_channel Source: NVD CPE · affected
Version / affected range: 2021
cpe:2.3:a:microsoft:office_long_term_servicing_channel:2021:*:*:*:*:-:x64:*
microsoft / office_long_term_servicing_channel Source: NVD CPE · affected
Version / affected range: 2021
cpe:2.3:a:microsoft:office_long_term_servicing_channel:2021:*:*:*:*:-:x86:*
microsoft / office_long_term_servicing_channel Source: NVD CPE · affected
Version / affected range: 2021
cpe:2.3:a:microsoft:office_long_term_servicing_channel:2021:*:*:*:*:macos:*:*
microsoft / office_long_term_servicing_channel Source: NVD CPE · affected
Version / affected range: 2024
cpe:2.3:a:microsoft:office_long_term_servicing_channel:2024:*:*:*:*:-:x64:*
microsoft / office_long_term_servicing_channel Source: NVD CPE · affected
Version / affected range: 2024
cpe:2.3:a:microsoft:office_long_term_servicing_channel:2024:*:*:*:*:-:x86:*
microsoft / office_long_term_servicing_channel Source: NVD CPE · affected
Version / affected range: 2024
cpe:2.3:a:microsoft:office_long_term_servicing_channel:2024:*:*:*:*:macos:*:*
microsoft / word Source: NVD CPE · affected
Version / affected range: 2016
cpe:2.3:a:microsoft:word:2016:*:*:*:*:*:x64:*
microsoft / word Source: NVD CPE · affected
Version / affected range: 2016
cpe:2.3:a:microsoft:word:2016:*:*:*:*:*:x86:*

References

[email protected]

Last enrichment sync: 04-Nov-2026 00:10
Sources: NVD · FIRST EPSS · CISA KEV
Latest successful provider update; providers refresh independently.

Reported Context (1)

The company also draws attention to two high-severity remote code execution defects in Microsoft Word (CVE-2026-40364 and CVE-2026-40361, CVSS score of 8.4) that are more likely to be exploited. Microsoft Patches 137 Vulnerabilities; Adobe Fixes 52 Across 10 Products

CVE (2)

People (1)

Vendors (2)

Products (22)

Note: Related entities, including threat actors, malware, CVEs, MITRE ATT&CK techniques, vendors, products, tools, countries, and industries, are shown when they appear in the same reporting. Their presence does not necessarily mean they were targeted, compromised, vulnerable, responsible for the activity, or directly involved in the incident.