CVE-2026-55136— Microsoft Excel 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 Excel是美国Microsoft公司的一款电子表格软件。 Microsoft Office Excel存在缓冲区错误漏洞，该漏洞源于不受信任的指针取消引用，可能导致未经授权的攻击者本地执行代码。以下版本受到影响：Microsoft 365 Apps for Enterprise 16.0.1之前版本、Microsoft Excel 2016 16.0.0.0之前版本、Microsoft Office 2019 19.0.0之前版本、Microsoft Office 36
Possible ATT&CK Techniques 1 AI
T1203 · Exploitation for Client ExecutionAffected Version Matrix 9
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Microsoft | Microsoft 365 Apps for Enterprise | 16.0.1< https://aka.ms/OfficeSecurityReleases |
affected |
| Microsoft | Microsoft Excel 2016 | 16.0.0.0< 16.0.5561.1001 |
affected |
| Microsoft | Microsoft Office 2019 | 19.0.0< https://aka.ms/OfficeSecurityReleases |
affected |
| Microsoft | Microsoft Office 365 for Mac | 1.0.0< 16.111.26071215 |
affected |
| Microsoft | Microsoft Office LTSC 2021 | 16.0.1< https://aka.ms/OfficeSecurityReleases |
affected |
| Microsoft | Microsoft Office LTSC 2024 | 16.0.0< https://aka.ms/OfficeSecurityReleases |
affected |
| Microsoft | Microsoft Office LTSC for Mac 2021 | 16.0.1< 16.111.26071215 |
affected |
| Microsoft | Microsoft Office LTSC for Mac 2024 | 16.0.0< 16.111.26071215 |
affected |
| Microsoft | Office Online Server | 16.0.0.0< 16.0.10417.20175 |
affected |
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I. Basic Information for CVE-2026-55136
Vulnerability Information
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Vulnerability Title
Microsoft Excel Remote Code Execution Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Untrusted pointer dereference in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
非可信指针解引用
Source: CVE Program / CVE List V5
Vulnerability Title
Microsoft Office Excel 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Microsoft Office Excel是美国Microsoft公司的一款电子表格软件。 Microsoft Office Excel存在缓冲区错误漏洞，该漏洞源于不受信任的指针取消引用，可能导致未经授权的攻击者本地执行代码。以下版本受到影响：Microsoft 365 Apps for Enterprise 16.0.1之前版本、Microsoft Excel 2016 16.0.0.0之前版本、Microsoft Office 2019 19.0.0之前版本、Microsoft Office 36
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Microsoft | Microsoft 365 Apps for Enterprise | 16.0.1 ~ https://aka.ms/OfficeSecurityReleases | - |
|
| Microsoft | Microsoft Excel 2016 | 16.0.0.0 ~ 16.0.5561.1001 | - |
|
| Microsoft | Microsoft Office 2019 | 19.0.0 ~ https://aka.ms/OfficeSecurityReleases | - |
|
| Microsoft | Microsoft Office 365 for Mac | 1.0.0 ~ 16.111.26071215 | - |
|
| Microsoft | Microsoft Office LTSC 2021 | 16.0.1 ~ https://aka.ms/OfficeSecurityReleases | - |
|
| Microsoft | Microsoft Office LTSC 2024 | 16.0.0 ~ https://aka.ms/OfficeSecurityReleases | - |
|
| Microsoft | Microsoft Office LTSC for Mac 2021 | 16.0.1 ~ 16.111.26071215 | - |
|
| Microsoft | Microsoft Office LTSC for Mac 2024 | 16.0.0 ~ 16.111.26071215 | - |
|
| Microsoft | Office Online Server | 16.0.0.0 ~ 16.0.10417.20175 | - |
|
II. Public POCs for CVE-2026-55136
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Vendor Advisories for CVE-2026-55136 (1)
Same Patch Batch · Microsoft · 2026-07-14 · 570 CVEs total
| CVE-2026-57092 | 9.9 CRITICAL | Microsoft Windows VMSwitch Elevation of Privilege Vulnerability |
| CVE-2026-56190 | 9.8 CRITICAL | Remote Desktop Protocol Remote Code Execution Vulnerability |
| CVE-2026-50518 | 9.8 CRITICAL | Windows DHCP Server Remote Code Execution Vulnerability |
| CVE-2026-56159 | 9.8 CRITICAL | DHCP Server Service Remote Code Execution Vulnerability |
| CVE-2026-55944 | 9.8 CRITICAL | Microsoft Dynamics NAV and Microsoft Dynamics 365 Business Central (On Premises) Remote Co |
| CVE-2026-42990 | 9.8 CRITICAL | SQL Server ODBC driver Elevation of Privilege Vulnerability |
| CVE-2026-54118 | 9.8 CRITICAL | Microsoft SQL Server Remote Code Execution Vulnerability |
| CVE-2026-56188 | 9.8 CRITICAL | Windows Server Network driver Remote Code Execution Vulnerability |
| CVE-2026-54117 | 9.8 CRITICAL | Microsoft SQL Server Remote Code Execution Vulnerability |
| CVE-2026-50522 | 9.8 CRITICAL | Microsoft SharePoint Remote Code Execution Vulnerability |
| CVE-2026-54990 | 9.8 CRITICAL | Remote Desktop Client Remote Code Execution Vulnerability |
| CVE-2026-58644 | 9.8 CRITICAL | Microsoft SharePoint Remote Code Execution Vulnerability |
| CVE-2026-50447 | 9.8 CRITICAL | Windows Message Queuing Service (MSMQ) Remote Code Execution Vulnerability |
| CVE-2026-55010 | 9.8 CRITICAL | Minecraft Bedrock Dedicated Server Remote Code Execution Vulnerability |
| CVE-2026-49172 | 9.8 CRITICAL | Windows FTP Service Remote Code Execution Vulnerability |
| CVE-2026-48561 | 9.6 CRITICAL | Microsoft Edge Copilot Remote Code Execution Vulnerability |
| CVE-2026-50380 | 9.6 CRITICAL | Windows GDI+ Remote Code Execution Vulnerability |
| CVE-2026-55008 | 9.6 CRITICAL | Microsoft Exchange Server Spoofing Vulnerability |
| CVE-2026-49798 | 9.3 CRITICAL | Windows Kernel Elevation of Privilege Vulnerability |
| CVE-2026-55040 | 9.1 CRITICAL | Microsoft SharePoint Server Security Feature Bypass Vulnerability |
Showing top 20 of 570 CVEs. View all on vendor page → →
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V. Comments for CVE-2026-55136
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