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CVE-2026-69374— Windows SMB Server Denial of Service Vulnerability

Quick assessment

Affected
Microsoft Windows 10 Version 21H2
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.

Windows SMB 服务器在分配资源时缺乏限制或流控，使得经过身份验证的攻击者能够通过网络触发服务拒绝（DoS）漏洞。

CVSS 6.5 · Medium

Affected Version Matrix 10

VendorProduct Version RangeStatus
Microsoft Windows 10 Version 21H2 10.0.19044.0< 10.0.19044.7725 affected
Microsoft Windows 10 Version 22H2 10.0.19045.0< 10.0.19045.7725 affected
Microsoft Windows 11 version 23H2 10.0.22631.0< 10.0.22631.7582 affected
Microsoft Windows 11 Version 23H2 10.0.22631.0< 10.0.22631.7582 affected
Microsoft Windows 11 Version 24H2 10.0.26100.0< 10.0.26100.9445 affected
Microsoft Windows 11 Version 25H2 10.0.26200.0< 10.0.26200.9445 affected
Microsoft Windows 11 version 26H1 10.0.28000.0< 10.0.28000.2954 affected
Microsoft Windows Server 2022 10.0.20348.0< 10.0.20348.5622 affected
Microsoft Windows Server 2025 10.0.26100.0< 10.0.26100.33438 affected
Microsoft Windows Server 2025 (Server Core installation) 10.0.26100.0< 10.0.26100.33438 affected
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I. Basic Information for CVE-2026-69374

Vulnerability Information
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Vulnerability Title
Windows SMB Server Denial of Service Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Allocation of resources without limits or throttling in Windows SMB Server allows an authorized attacker to deny service over a network.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
不加限制或调节的资源分配
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Microsoft Windows 10 Version 21H2 10.0.19044.0 ~ 10.0.19044.7725 -
Microsoft Windows 10 Version 22H2 10.0.19045.0 ~ 10.0.19045.7725 -
Microsoft Windows 11 version 23H2 10.0.22631.0 ~ 10.0.22631.7582 -
Microsoft Windows 11 Version 23H2 10.0.22631.0 ~ 10.0.22631.7582 -
Microsoft Windows 11 Version 24H2 10.0.26100.0 ~ 10.0.26100.9445 -
Microsoft Windows 11 Version 25H2 10.0.26200.0 ~ 10.0.26200.9445 -
Microsoft Windows 11 version 26H1 10.0.28000.0 ~ 10.0.28000.2954 -
Microsoft Windows Server 2022 10.0.20348.0 ~ 10.0.20348.5622 -
Microsoft Windows Server 2025 10.0.26100.0 ~ 10.0.26100.33438 -
Microsoft Windows Server 2025 (Server Core installation) 10.0.26100.0 ~ 10.0.26100.33438 -

II. Public POCs for CVE-2026-69374

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III. Intelligence Information for CVE-2026-69374

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Vendor Advisories for CVE-2026-69374 (1)

Same Patch Batch · Microsoft · 2026-09-08 · 966 CVEs total

CVE-2026-83941 9.9 CRITICAL Entra ID Elevation of Privilege Vulnerability
CVE-2026-73009 9.8 CRITICAL Windows Secure Socket Tunneling Protocol (SSTP) Remote Code Execution Vulnerability
CVE-2026-69491 9.8 CRITICAL Microsoft DirectMusic Remote Code Execution Vulnerability
CVE-2026-69431 9.8 CRITICAL Telnet Client Remote Code Execution Vulnerability
CVE-2026-77493 9.8 CRITICAL Windows Graphics Component Remote Code Execution Vulnerability
CVE-2026-68839 9.8 CRITICAL Windows USB Mass Storage Class Driver Remote Code Execution Vulnerability
CVE-2026-69408 9.8 CRITICAL Microsoft Windows Media Foundation Remote Code Execution Vulnerability
CVE-2026-69586 9.8 CRITICAL Microsoft Windows PDF Remote Code Execution Vulnerability
CVE-2026-78509 9.8 CRITICAL Microsoft Office Outlook Remote Code Execution Vulnerability
CVE-2026-69496 9.8 CRITICAL Windows Compressed Folder Remote Code Execution Vulnerability
CVE-2026-78510 9.8 CRITICAL Microsoft Word Remote Code Execution Vulnerability
CVE-2026-70296 9.8 CRITICAL Windows Imaging Component Remote Code Execution Vulnerability
CVE-2026-69525 9.8 CRITICAL Remote Desktop Services Remote Code Execution Vulnerability
CVE-2026-69845 9.8 CRITICAL Windows DHCP Server Remote Code Execution Vulnerability
CVE-2026-69769 9.8 CRITICAL Windows HTTP Print Provider Remote Code Execution Vulnerability
CVE-2026-69829 9.8 CRITICAL Windows Shell Remote Code Execution Vulnerability
CVE-2026-78445 9.8 CRITICAL Windows Services for NFS ONCRPC XDR Driver Remote Code Execution Vulnerability
CVE-2026-69590 9.8 CRITICAL Windows Routing and Remote Access Service (RRAS) Remote Code Execution Vulnerability
CVE-2026-73010 9.8 CRITICAL Microsoft Failover Cluster Remote Code Execution Vulnerability
CVE-2026-69824 9.8 CRITICAL Microsoft Standard XPS Remote Code Execution Vulnerability

Showing top 20 of 966 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Windows 10 Version 21H2
Same vendor: Microsoft
Same weakness: CWE-770

V. Comments for CVE-2026-69374

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