Heap-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code over a network.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00451.

Exploitation none

Automatable no

Technical Impact total

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Microsoft Microsoft 365 Apps for Enterprise affected
Version Status Constraints
16.0.1 affected < https://aka.ms/OfficeSecurityReleases
Microsoft Microsoft Office 365 for Mac affected
Version Status Constraints
1.0.0 affected < 16.114.26101123
Microsoft Microsoft Office LTSC 2021 affected
Version Status Constraints
16.0.1 affected < 16.0.14334.20974
Microsoft Microsoft Office LTSC 2024 affected
Version Status Constraints
16.0.0 affected < 16.0.17932.21056
Microsoft Microsoft Office LTSC for Mac 2021 affected
Version Status Constraints
16.0.1 affected < 16.114.26101123
Microsoft Microsoft Office LTSC for Mac 2024 affected
Version Status Constraints
16.0.0 affected < 16.114.26101123

No data.

No data.

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No data.

Project Subscriptions

Vendors Products
Microsoft Subscribe
365 Apps Subscribe
Office 2021 Subscribe
Office 2024 Subscribe
Office 365 Subscribe
Office Macos 2021 Subscribe
Office Macos 2024 Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-108430 cve-icon cve-icon
History

Fri, 16 Oct 2026 02:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Thu, 15 Oct 2026 21:00:00 +0000

Type Values Removed Values Added
Description Heap-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code over a network.
Title Microsoft Office Word Remote Code Execution Vulnerability
First Time appeared Microsoft
Microsoft 365 Apps
Microsoft office 2021
Microsoft office 2024
Microsoft office 365
Microsoft office Macos 2021
Microsoft office Macos 2024
Weaknesses CWE-122
CPEs cpe:2.3:a:microsoft:365_apps:*:*:*:*:enterprise:*:*:*
cpe:2.3:a:microsoft:office_2021:*:*:*:*:long_term_servicing_channel:*:*:*
cpe:2.3:a:microsoft:office_2024:*:*:*:*:long_term_servicing_channel:*:*:*
cpe:2.3:a:microsoft:office_365:*:*:*:*:*:macos:*:*
cpe:2.3:a:microsoft:office_macos_2021:*:*:*:*:*:long_term_servicing_channel:*:*
cpe:2.3:a:microsoft:office_macos_2024:*:*:*:*:*:long_term_servicing_channel:*:*
Vendors & Products Microsoft
Microsoft 365 Apps
Microsoft office 2021
Microsoft office 2024
Microsoft office 365
Microsoft office Macos 2021
Microsoft office Macos 2024
References
Metrics cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: microsoft

Published:

Updated: 2026-10-16T17:26:59.071Z

Reserved: 2026-10-09T21:52:56.477Z

Link: CVE-2026-108430

cve-icon Vulnrichment

Updated: 2026-10-16T01:04:19.496Z

cve-icon NVD

Status : Received

Published: 2026-10-15T21:17:08.303

Modified: 2026-10-16T03:17:59.120

Link: CVE-2026-108430

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-16T13:53:12Z

Weaknesses