CVE-2026-88109— Microsoft Office Click-To-Run Elevation of Privilege 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 Click-To-Run 中存在释放后使用（Use After Free）漏洞，攻击者可利用该漏洞以本地方式提升权限。
Possible ATT&CK Techniques 2 AI
T1211 · Exploitation for Stealth T1190 · Exploit Public-Facing ApplicationAffected Version Matrix 3
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Microsoft | Microsoft 365 Apps for Enterprise | 16.0.1< https://aka.ms/OfficeSecurityReleases |
affected |
| Microsoft | Microsoft Office LTSC 2021 | 16.0.1< 16.0.14334.20974 |
affected |
| Microsoft | Microsoft Office LTSC 2024 | 16.0.0< 16.0.17932.21056 |
affected |
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I. Basic Information for CVE-2026-88109
Vulnerability Information
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Vulnerability Title
Microsoft Office Click-To-Run Elevation of Privilege Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Use after free in Microsoft Office Click-To-Run allows an authorized attacker to elevate privileges locally.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
释放后使用
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 LTSC 2021 | 16.0.1 ~ 16.0.14334.20974 | - |
|
| Microsoft | Microsoft Office LTSC 2024 | 16.0.0 ~ 16.0.17932.21056 | - |
|
II. Public POCs for CVE-2026-88109
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Vendor Advisories for CVE-2026-88109 (1)
Same Patch Batch · Microsoft · 2026-10-13 · 1407 CVEs total
| CVE-2026-69705 | 9.8 CRITICAL | Windows iSCSI Remote Code Execution Vulnerability |
| CVE-2026-88178 | 9.8 CRITICAL | Microsoft Office PowerPoint Remote Code Execution Vulnerability |
| CVE-2026-88156 | 9.8 CRITICAL | Microsoft Office Outlook Remote Code Execution Vulnerability |
| CVE-2026-100222 | 9.8 CRITICAL | Network Policy Server (NPS) Remote Code Execution Vulnerability |
| CVE-2026-85928 | 9.8 CRITICAL | Windows Volume Manager Extension Driver Remote Code Execution Vulnerability |
| CVE-2026-96096 | 9.8 CRITICAL | Windows Media Player Remote Code Execution Vulnerability |
| CVE-2026-70291 | 9.8 CRITICAL | Microsoft Office Outlook Remote Code Execution Vulnerability |
| CVE-2026-96934 | 9.8 CRITICAL | Windows DHCP Server Remote Code Execution Vulnerability |
| CVE-2026-96924 | 9.8 CRITICAL | Windows OLE Remote Code Execution Vulnerability |
| CVE-2026-97816 | 9.8 CRITICAL | Microsoft OpenSSH for Windows Remote Code Execution Vulnerability |
| CVE-2026-83770 | 9.8 CRITICAL | Windows Text Shaping Remote Code Execution Vulnerability |
| CVE-2026-97814 | 9.8 CRITICAL | Windows Text Shaping Remote Code Execution Vulnerability |
| CVE-2026-97815 | 9.8 CRITICAL | Windows Error Reporting Remote Code Execution Vulnerability |
| CVE-2026-96113 | 9.8 CRITICAL | Windows Domain Name Service Remote Code Execution Vulnerability |
| CVE-2026-97805 | 9.8 CRITICAL | Windows Partition Management Driver Remote Code Execution Vulnerability |
| CVE-2026-83748 | 9.8 CRITICAL | Windows Error Reporting Remote Code Execution Vulnerability |
| CVE-2026-96909 | 9.8 CRITICAL | Windows BitLocker Remote Code Execution Vulnerability |
| CVE-2026-69634 | 9.8 CRITICAL | Windows iSCSI Remote Code Execution Vulnerability |
| CVE-2026-85814 | 9.8 CRITICAL | Microsoft Windows Media Foundation Remote Code Execution Vulnerability |
| CVE-2026-83782 | 9.8 CRITICAL | Windows Shell Remote Code Execution Vulnerability |
Showing top 20 of 1407 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
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V. Comments for CVE-2026-88109
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