CVE-2026-40378— Windows Local Security Authority Subsystem Service (LSASS) Denial of Service Vulnerability
Affected Version Matrix 20
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Microsoft | Windows 10 Version 1607 | 10.0.14393.0< 10.0.14393.9339 | affected |
| Microsoft | Windows 10 Version 1809 | 10.0.17763.0< 10.0.17763.9020 | affected |
| Microsoft | Windows 10 Version 21H2 | 10.0.19044.0< 10.0.19044.7548 | affected |
| Microsoft | Windows 10 Version 22H2 | 10.0.19045.0< 10.0.19045.7548 | affected |
| Microsoft | Windows 11 version 23H2 | 10.0.22631.0< 10.0.22631.7376 | affected |
| Microsoft | Windows 11 Version 23H2 | 10.0.22631.0< 10.0.22631.7376 | affected |
| Microsoft | Windows 11 Version 24H2 | 10.0.26100.0< 10.0.26100.8875 | affected |
| Microsoft | Windows 11 Version 25H2 | 10.0.26200.0< 10.0.26200.8875 | affected |
| Microsoft | Windows 11 version 26H1 | 10.0.28000.0< 10.0.28000.2525 | affected |
| Microsoft | Windows Server 2012 | 6.2.9200.0< 6.2.9200.26226 | affected |
| Microsoft | Windows Server 2012 (Server Core installation) | 6.2.9200.0< 6.2.9200.26226 | affected |
| Microsoft | Windows Server 2012 R2 | 6.3.9600.0< 6.3.9600.23291 | affected |
| Microsoft | Windows Server 2012 R2 (Server Core installation) | 6.3.9600.0< 6.3.9600.23291 | affected |
| Microsoft | Windows Server 2016 | 10.0.14393.0< 10.0.14393.9339 | affected |
| Microsoft | Windows Server 2016 (Server Core installation) | 10.0.14393.0< 10.0.14393.9339 | affected |
| Microsoft | Windows Server 2019 | 10.0.17763.0< 10.0.17763.9020 | affected |
| Microsoft | Windows Server 2019 (Server Core installation) | 10.0.17763.0< 10.0.17763.9020 | affected |
| Microsoft | Windows Server 2022 | 10.0.20348.0< 10.0.20348.5386 | affected |
| Microsoft | Windows Server 2025 | 10.0.26100.0< 10.0.26100.33158 | affected |
| Microsoft | Windows Server 2025 (Server Core installation) | 10.0.26100.0< 10.0.26100.33158 | affected |
Get alerts for future matching vulnerabilitiesLog in to subscribe
I. Basic Information for CVE-2026-40378
Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗ Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.
Vulnerability Title
Windows Local Security Authority Subsystem Service (LSASS) Denial of Service Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Memory allocation with excessive size value in Windows Local Security Authority Subsystem Service (LSASS) allows an unauthorized attacker to deny service over a network.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未经控制的内存分配
Source: CVE Program / CVE List V5
Vulnerability Title
Microsoft Windows Local Security Authority Subsystem Service 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Microsoft Windows Local Security Authority Subsystem Service是美国Microsoft公司的一个内部程序,负责运行Windows系统安全政策。它在用户登录时电脑单机或服务器时,验证用户身份,管理用户密码变更,并产生访问字符。它也会在窗口安全日志中留下应有的记录。 Microsoft Windows Local Security Authority Subsystem Service存在资源管理错误漏洞，该漏洞源于内存分配时使用过大的值，可能导致未经
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
II. Public POCs for CVE-2026-40378
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POCPremium
No public POC found.
Login to generate AI POCIII. Intelligence Information for CVE-2026-40378
请登录查看更多情报信息。
Vendor Advisories for CVE-2026-40378 (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-2026-56159 | 9.8 CRITICAL | DHCP Server Service Remote Code Execution Vulnerability |
| CVE-2026-50518 | 9.8 CRITICAL | Windows DHCP Server Remote Code Execution Vulnerability |
| CVE-2026-55944 | 9.8 CRITICAL | Microsoft Dynamics NAV and Microsoft Dynamics 365 Business Central (On Premises) Remote Co |
| CVE-2026-56190 | 9.8 CRITICAL | Remote Desktop Protocol Remote Code Execution Vulnerability |
| CVE-2026-42990 | 9.8 CRITICAL | SQL Server ODBC driver Elevation of Privilege Vulnerability |
| CVE-2026-54990 | 9.8 CRITICAL | Remote Desktop Client Remote Code Execution Vulnerability |
| CVE-2026-56188 | 9.8 CRITICAL | Windows Server Network driver Remote Code Execution Vulnerability |
| CVE-2026-50522 | 9.8 CRITICAL | Microsoft SharePoint Remote Code Execution Vulnerability |
| CVE-2026-58644 | 9.8 CRITICAL | Microsoft SharePoint Remote Code Execution Vulnerability |
| CVE-2026-49172 | 9.8 CRITICAL | Windows FTP Service Remote Code Execution Vulnerability |
| CVE-2026-55010 | 9.8 CRITICAL | Minecraft Bedrock Dedicated Server Remote Code Execution Vulnerability |
| CVE-2026-50447 | 9.8 CRITICAL | Windows Message Queuing Service (MSMQ) 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 |
| CVE-2026-47632 | 8.8 HIGH | Azure Monitor Agent Metrics Extension Elevation of Privilege Vulnerability |
| CVE-2026-48564 | 8.8 HIGH | DHCP Server Service Remote Code Execution Vulnerability |
Showing top 20 of 570 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Windows 10 Version 1607
- CVE-2026-58637
Windows Client-Side Caching Elevation of Privilege Vulnerabi - CVE-2026-58632
Windows Win32 Kernel Subsystem Elevation of Privilege Vulner - CVE-2026-58629
DirectX Graphics Kernel Elevation of Privilege Vulnerability - CVE-2026-58627
Windows DHCP Server Denial of Service Vulnerability - CVE-2026-58619
Windows Sensor Data Service Elevation of Privilege Vulnerabi
Same vendor: Microsoft
- CVE-2026-57990
Microsoft Edge (Chromium-based) Information Disclosure Vulne - CVE-2026-57989
Microsoft Edge (Chromium-based) Information Disclosure Vulne - CVE-2026-57978
Microsoft Edge (Chromium-based) Spoofing Vulnerability - CVE-2026-62835
Azure Portal Information Disclosure Vulnerability - CVE-2026-56163
Microsoft Azure Kubernetes Service Elevation of Privilege Vu
Same weakness: CWE-789
- CVE-2026-65315
Ollama Remote Denial of Service via Attacker-Controlled Allo - CVE-2026-59844
Libssh: libssh: denial of service via oversized sftp read le - CVE-2025-71395
SurrealDB before 2.2.2 Memory Exhaustion via string::replace - CVE-2026-44453
h2o is vulnerable to musl libc stack overflow - CVE-2026-58559
Huawei harmonyos 资源管理错误漏洞
V. Comments for CVE-2026-40378
No comments yet