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CVE-2026-20875— Windows Local Security Authority Subsystem Service (LSASS) Denial of Service Vulnerability

CVSS 7.5 · High EPSS 0.08% · P23
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I. Basic Information for CVE-2026-20875

Vulnerability Information
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Vulnerability Title
Windows Local Security Authority Subsystem Service (LSASS) Denial of Service Vulnerability
Source: NVD (National Vulnerability Database)
Vulnerability Description
Null pointer dereference in Windows Local Security Authority Subsystem Service (LSASS) allows an unauthorized attacker to deny service over a network.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
空指针解引用
Source: NVD (National Vulnerability Database)
Vulnerability Title
Microsoft Windows Local Security Authority Subsystem Service 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Microsoft Windows Local Security Authority Subsystem Service是美国微软（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存在代码问题漏洞。攻击者利用该漏洞导致系统拒绝服务。以下产品
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

VendorProductAffected VersionsCPESubscribe
MicrosoftWindows 10 Version 1607 10.0.14393.0 ~ 10.0.14393.8783 -
MicrosoftWindows 10 Version 1809 10.0.17763.0 ~ 10.0.17763.8276 -
MicrosoftWindows 10 Version 21H2 10.0.19044.0 ~ 10.0.19044.6809 -
MicrosoftWindows 10 Version 22H2 10.0.19045.0 ~ 10.0.19045.6809 -
MicrosoftWindows 11 version 22H3 10.0.22631.0 ~ 10.0.22631.6491 -
MicrosoftWindows 11 Version 23H2 10.0.22631.0 ~ 10.0.22631.6491 -
MicrosoftWindows 11 Version 24H2 10.0.26100.0 ~ 10.0.26100.7623 -
MicrosoftWindows 11 Version 25H2 10.0.26200.0 ~ 10.0.26200.7623 -
MicrosoftWindows Server 2008 R2 Service Pack 1 6.1.7601.0 ~ 6.1.7601.28117 -
MicrosoftWindows Server 2008 R2 Service Pack 1 (Server Core installation) 6.1.7601.0 ~ 6.1.7601.28117 -
MicrosoftWindows Server 2008 Service Pack 2 6.0.6003.0 ~ 6.0.6003.23717 -
MicrosoftWindows Server 2008 Service Pack 2 (Server Core installation) 6.0.6003.0 ~ 6.0.6003.23717 -
MicrosoftWindows Server 2012 6.2.9200.0 ~ 6.2.9200.25868 -
MicrosoftWindows Server 2012 (Server Core installation) 6.2.9200.0 ~ 6.2.9200.25868 -
MicrosoftWindows Server 2012 R2 6.3.9600.0 ~ 6.3.9600.22968 -
MicrosoftWindows Server 2012 R2 (Server Core installation) 6.3.9600.0 ~ 6.3.9600.22968 -
MicrosoftWindows Server 2016 10.0.14393.0 ~ 10.0.14393.8783 -
MicrosoftWindows Server 2016 (Server Core installation) 10.0.14393.0 ~ 10.0.14393.8783 -
MicrosoftWindows Server 2019 10.0.17763.0 ~ 10.0.17763.8276 -
MicrosoftWindows Server 2019 (Server Core installation) 10.0.17763.0 ~ 10.0.17763.8276 -
MicrosoftWindows Server 2022 10.0.20348.0 ~ 10.0.20348.4648 -
MicrosoftWindows Server 2022, 23H2 Edition (Server Core installation) 10.0.25398.0 ~ 10.0.25398.2092 -
MicrosoftWindows Server 2025 10.0.26100.0 ~ 10.0.26100.32230 -
MicrosoftWindows Server 2025 (Server Core installation) 10.0.26100.0 ~ 10.0.26100.32230 -

II. Public POCs for CVE-2026-20875

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III. Intelligence Information for CVE-2026-20875

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Same Patch Batch · Microsoft · 2026-01-13 · 112 CVEs total

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CVE-2026-209448.4 HIGHMicrosoft Word Remote Code Execution Vulnerability
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CVE-2026-208377.8 HIGHWindows Media Remote Code Execution Vulnerability
CVE-2026-212247.8 HIGHAzure Connected Machine Agent Elevation of Privilege Vulnerability
CVE-2026-208407.8 HIGHWindows NTFS Remote Code Execution Vulnerability
CVE-2026-209567.8 HIGHMicrosoft Excel Remote Code Execution Vulnerability
CVE-2026-208777.8 HIGHWindows Management Services Elevation of Privilege Vulnerability
CVE-2026-208657.8 HIGHWindows Management Services Elevation of Privilege Vulnerability
CVE-2026-209467.8 HIGHMicrosoft Excel Remote Code Execution Vulnerability

Showing top 20 of 112 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Windows 10 Version 1607
Same vendor: Microsoft
Same weakness: CWE-476

V. Comments for CVE-2026-20875

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