CVE-2026-62799— Windows SMB Client Elevation of Privilege Vulnerability
Quick assessment
Affected
Microsoft Windows 11 version 26H1
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 Windows SMB Client是美国Microsoft公司的一款支持SMB协议的客户端组件。 Microsoft Windows SMB Client存在缓冲区错误漏洞，该漏洞源于Windows SMB Client存在堆缓冲区溢出，可能导致授权攻击者在本地提升权限。
Possible ATT&CK Techniques 1 AI
T1190 · Exploit Public-Facing ApplicationAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Microsoft | Windows 11 version 26H1 | 10.0.28000.0< 10.0.28000.2704 |
affected |
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I. Basic Information for CVE-2026-62799
Vulnerability Information
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Vulnerability Title
Windows SMB Client Elevation of Privilege Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Heap-based buffer overflow in Windows SMB Client 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
堆缓冲区溢出
Source: CVE Program / CVE List V5
Vulnerability Title
Microsoft Windows SMB Client 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Microsoft Windows SMB Client是美国Microsoft公司的一款支持SMB协议的客户端组件。 Microsoft Windows SMB Client存在缓冲区错误漏洞，该漏洞源于Windows SMB Client存在堆缓冲区溢出，可能导致授权攻击者在本地提升权限。
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 | Windows 11 version 26H1 | 10.0.28000.0 ~ 10.0.28000.2704 | - |
|
II. Public POCs for CVE-2026-62799
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2026-62799 (1)
Same Patch Batch · Microsoft · 2026-08-11 · 402 CVEs total
| CVE-2026-62878 | 9.8 CRITICAL | Windows DNS Server Remote Code Execution Vulnerability |
| CVE-2026-65791 | 9.8 CRITICAL | Windows iSCSI Target Service Remote Code Execution Vulnerability |
| CVE-2026-62893 | 9.8 CRITICAL | Windows Deployment Services TFTP Server Remote Code Execution Vulnerability |
| CVE-2026-59124 | 9.8 CRITICAL | Microsoft High Performance Computing (HPC) Pack Remote Code Execution Vulnerability |
| CVE-2026-62815 | 9.8 CRITICAL | Microsoft QUIC Remote Code Execution Vulnerability |
| CVE-2026-50516 | 9.4 CRITICAL | Microsoft Azure Kubernetes Service Elevation of Privilege Vulnerability |
| CVE-2026-70306 | 9.3 CRITICAL | Microsoft Office SharePoint Spoofing Vulnerability |
| CVE-2026-69320 | 8.8 HIGH | Visual Studio Code Remote Code Execution Vulnerability |
| CVE-2026-65658 | 8.8 HIGH | Microsoft SharePoint Server Remote Code Execution Vulnerability |
| CVE-2026-65767 | 8.8 HIGH | Microsoft Teams for Android Spoofing Vulnerability |
| CVE-2026-70326 | 8.8 HIGH | Microsoft SharePoint Server Elevation of Privilege Vulnerability |
| CVE-2026-62795 | 8.8 HIGH | Windows LDAP - Lightweight Directory Access Protocol Remote Code Execution Vulnerability |
| CVE-2026-70337 | 8.8 HIGH | Microsoft PowerShell Remote Code Execution Vulnerability |
| CVE-2026-66805 | 8.8 HIGH | Microsoft SharePoint Server Remote Code Execution Vulnerability |
| CVE-2026-66808 | 8.8 HIGH | Microsoft SharePoint Server Remote Code Execution Vulnerability |
| CVE-2026-62817 | 8.8 HIGH | Windows DNS Server Remote Code Execution Vulnerability |
| CVE-2026-62790 | 8.8 HIGH | Windows SMBv3 Server Remote Code Execution Vulnerability |
| CVE-2026-62822 | 8.8 HIGH | Windows GDI+ Remote Code Execution Vulnerability |
| CVE-2026-62823 | 8.8 HIGH | Windows DHCP Server Remote Code Execution Vulnerability |
| CVE-2026-62824 | 8.8 HIGH | Remote Desktop Client Remote Code Execution Vulnerability |
Showing top 20 of 402 CVEs. View all on vendor page → →
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V. Comments for CVE-2026-62799
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