CVE-2026-108443— Microsoft Office Word Remote Code Execution Vulnerability
Quick assessment
Affected
Microsoft Microsoft 365 Apps for Enterprise
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Microsoft Office Word 中存在的“多一错误”（Off-by-one error）漏洞，允许未经授权的攻击者通过网络执行代码。
Possible ATT&CK Techniques 2 AI
T1203 · Exploitation for Client Execution T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-108443
Vulnerability Information
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Vulnerability Title
Microsoft Office Word Remote Code Execution Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Off-by-one error in Microsoft Office Word allows an unauthorized attacker to execute code over a network.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
Off-by-one错误
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Microsoft | Microsoft 365 Apps for Enterprise | 16.0.1 ~ https://aka.ms/OfficeSecurityReleases | - |
|
| Microsoft | Microsoft Office 365 for Mac | 1.0.0 ~ 16.114.26101123 | - |
|
| Microsoft | Microsoft Office LTSC 2021 | 16.0.1 ~ 16.0.14334.20974 | - |
|
| Microsoft | Microsoft Office LTSC 2024 | 16.0.0 ~ 16.0.17932.21056 | - |
|
| Microsoft | Microsoft Office LTSC for Mac 2021 | 16.0.1 ~ 16.114.26101123 | - |
|
| Microsoft | Microsoft Office LTSC for Mac 2024 | 16.0.0 ~ 16.114.26101123 | - |
|
II. Public POCs for CVE-2026-108443
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Vendor Advisories for CVE-2026-108443 (1)
Same Patch Batch · Microsoft · 2026-10-15 · 31 CVEs total
| CVE-2026-108441 | 8.8 HIGH | Microsoft Office Word Remote Code Execution Vulnerability |
| CVE-2026-108426 | 8.8 HIGH | Microsoft Office Word Remote Code Execution Vulnerability |
| CVE-2026-108429 | 8.8 HIGH | Microsoft Office Word Remote Code Execution Vulnerability |
| CVE-2026-108427 | 8.8 HIGH | Microsoft Office Word Remote Code Execution Vulnerability |
| CVE-2026-108428 | 8.8 HIGH | Microsoft Office Word Remote Code Execution Vulnerability |
| CVE-2026-108431 | 8.8 HIGH | Microsoft Office Word Remote Code Execution Vulnerability |
| CVE-2026-108430 | 8.8 HIGH | Microsoft Office Word Remote Code Execution Vulnerability |
| CVE-2026-108432 | 8.8 HIGH | Microsoft Office Word Remote Code Execution Vulnerability |
| CVE-2026-108437 | 8.8 HIGH | Microsoft Office Word Remote Code Execution Vulnerability |
| CVE-2026-108439 | 8.8 HIGH | Microsoft Office Word Remote Code Execution Vulnerability |
| CVE-2026-108440 | 8.8 HIGH | Microsoft Office Word Remote Code Execution Vulnerability |
| CVE-2026-108442 | 8.8 HIGH | Microsoft Office Word Remote Code Execution Vulnerability |
| CVE-2026-108444 | 8.8 HIGH | Microsoft Office Remote Code Execution Vulnerability |
| CVE-2026-108446 | 8.8 HIGH | Microsoft Office Excel Remote Code Execution Vulnerability |
| CVE-2026-108447 | 8.8 HIGH | Microsoft Office Word Remote Code Execution Vulnerability |
| CVE-2026-108445 | 8.8 HIGH | Microsoft Office Word Remote Code Execution Vulnerability |
| CVE-2026-108451 | 8.8 HIGH | Microsoft Office Word Remote Code Execution Vulnerability |
| CVE-2026-108449 | 8.8 HIGH | Microsoft Office Word Remote Code Execution Vulnerability |
| CVE-2026-108450 | 8.8 HIGH | Microsoft Office Word Remote Code Execution Vulnerability |
| CVE-2026-108452 | 8.8 HIGH | Microsoft Office SharePoint Remote Code Execution Vulnerability |
Showing top 20 of 31 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Microsoft 365 Apps for Enterprise
-
CVE-2026-108455
Microsoft Office PowerPoint Information Disclosure Vulnerabi -
CVE-2026-108453
Microsoft Office PowerPoint Information Disclosure Vulnerabi -
CVE-2026-108454
Microsoft Office PowerPoint Information Disclosure Vulnerabi -
CVE-2026-108451
Microsoft Office Word Remote Code Execution Vulnerability -
CVE-2026-108450
Microsoft Office Word Remote Code Execution Vulnerability
Same vendor: Microsoft
-
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CVE-2026-108453
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CVE-2026-108451
Microsoft Office Word Remote Code Execution Vulnerability
Same weakness: CWE-193
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V. Comments for CVE-2026-108443
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