CVE-2021-36942— Windows LSA Spoofing Vulnerability

CVSS 7.5 · High KEV · Ransomware EPSS 66.02% · P99 Updated Aug 10, 2026

Public Exploits 1

Metasploit · 1 petitpotam.rb [auxiliary]

In-the-Wild Activity Observed cisa_kev · confirmed

Possible ATT&CK Techniques 1AI

Affected Version Matrix 14

Vendor	Product	Version Range	Status
Microsoft	Windows Server 2008 R2 Service Pack 1	`6.1.7601.0< 6.1.7601.25685`	affected
Microsoft	Windows Server 2008 R2 Service Pack 1 (Server Core installation)	`6.1.7601.0< 6.1.7601.25685`	affected
Microsoft	Windows Server 2008 Service Pack 2	`6.0.6003.0< 6.0.6003.21192`	affected
Microsoft	Windows Server 2008 Service Pack 2 (Server Core installation)	`6.0.6003.0< 6.0.6003.21192`	affected
Microsoft	Windows Server 2012	`6.2.9200.0< 6.2.9200.23435`	affected
Microsoft	Windows Server 2012 (Server Core installation)	`6.2.9200.0< 6.2.9200.23435`	affected
Microsoft	Windows Server 2012 R2	`6.3.9600.0< 6.3.9600.20094`	affected
Microsoft	Windows Server 2012 R2 (Server Core installation)	`6.3.9600.0< 6.3.9600.20094`	affected
Microsoft	Windows Server 2016	`10.0.14393.0< 10.0.14393.4583`	affected
Microsoft	Windows Server 2016 (Server Core installation)	`10.0.14393.0< 10.0.14393.4583`	affected
Microsoft	Windows Server 2019	`10.0.17763.0< 10.0.17763.2114`	affected
Microsoft	Windows Server 2019 (Server Core installation)	`10.0.17763.0< 10.0.17763.2114`	affected
Microsoft	Windows Server version 2004	`10.0.0< 10.0.19041.1165`	affected
Microsoft	Windows Server version 20H2	`10.0.0< 10.0.19042.1165`	affected

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I. Basic Information for CVE-2021-36942

Vulnerability Information

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Vulnerability Title

Windows LSA Spoofing Vulnerability

Source: CVE Program / CVE List V5

Vulnerability Description

Windows LSA Spoofing Vulnerability

Source: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Source: CVE Program / CVE List V5

Vulnerability Type

N/A

Source: CVE Program / CVE List V5

Vulnerability Title

Microsoft Windows 安全漏洞

Source: CNNVD (China National Vulnerability Database)

Vulnerability Description

Microsoft Windows是美国微软（Microsoft）公司的一套个人设备使用的操作系统。 Microsoft Windows存在安全漏洞。以下产品和版本受到影响：Windows Server 2019,Windows Server 2019 (Server Core installation),Windows Server, version 2004 (Server Core installation),Windows Server, version 20H2 (Server Core Ins

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)

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Affected Products

Vendor	Product	Affected Versions	CPE
Microsoft	Windows Server 2008 R2 Service Pack 1	6.1.7601.0 ~ 6.1.7601.25685	-
Microsoft	Windows Server 2008 R2 Service Pack 1 (Server Core installation)	6.1.7601.0 ~ 6.1.7601.25685	-
Microsoft	Windows Server 2008 Service Pack 2	6.0.6003.0 ~ 6.0.6003.21192	-
Microsoft	Windows Server 2008 Service Pack 2 (Server Core installation)	6.0.6003.0 ~ 6.0.6003.21192	-
Microsoft	Windows Server 2012	6.2.9200.0 ~ 6.2.9200.23435	-
Microsoft	Windows Server 2012 (Server Core installation)	6.2.9200.0 ~ 6.2.9200.23435	-
Microsoft	Windows Server 2012 R2	6.3.9600.0 ~ 6.3.9600.20094	-
Microsoft	Windows Server 2012 R2 (Server Core installation)	6.3.9600.0 ~ 6.3.9600.20094	-
Microsoft	Windows Server 2016	10.0.14393.0 ~ 10.0.14393.4583	-
Microsoft	Windows Server 2016 (Server Core installation)	10.0.14393.0 ~ 10.0.14393.4583	-
Microsoft	Windows Server 2019	10.0.17763.0 ~ 10.0.17763.2114	-
Microsoft	Windows Server 2019 (Server Core installation)	10.0.17763.0 ~ 10.0.17763.2114	-
Microsoft	Windows Server version 2004	10.0.0 ~ 10.0.19041.1165	-
Microsoft	Windows Server version 20H2	10.0.0 ~ 10.0.19042.1165	-

II. Public POCs for CVE-2021-36942

#	POC Description	Source Link	Shenlong Link

AI-Generated POCPremium

No public POC found.

III. Intelligence Information for CVE-2021-36942

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Vendor Advisories for CVE-2021-36942 (3)

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-36942x_refsource_MISC
https://www.kb.cert.org/vuls/id/405600third-party-advisoryx_refsource_CERT-VN
🔗 CVE-2021-36942 - Security Update Guide - Microsoft - Windows LSA Spoofing Vulnerabilityvendor-advisorypatch

https://www.cve.org/CVERecord?id=CVE-2021-36942

Same Patch Batch · Microsoft · 2021-08-12 · 45 CVEs total

CVE-2021-26424	9.9 CRITICAL	Windows TCP/IP Remote Code Execution Vulnerability
CVE-2021-26432	9.8 CRITICAL	Windows Services for NFS ONCRPC XDR Driver Remote Code Execution Vulnerability
CVE-2021-36947	8.8 HIGH	Windows Print Spooler Remote Code Execution Vulnerability
CVE-2021-34535	8.8 HIGH	Remote Desktop Client Remote Code Execution Vulnerability
CVE-2021-36936	8.8 HIGH	Windows Print Spooler Remote Code Execution Vulnerability
CVE-2021-34524	8.1 HIGH	Microsoft Dynamics 365 On-Premises Remote Code Execution Vulnerability
CVE-2021-34536	7.8 HIGH	Windows Storage Spaces Controller Elevation of Privilege Vulnerability
CVE-2021-36937	7.8 HIGH	Windows Media MPEG-4 Video Decoder Remote Code Execution Vulnerability
CVE-2021-34483	7.8 HIGH	Windows Print Spooler Elevation of Privilege Vulnerability
CVE-2021-36941	7.8 HIGH	Microsoft Word Remote Code Execution Vulnerability
CVE-2021-26425	7.8 HIGH	Windows Event Tracing Elevation of Privilege Vulnerability
CVE-2021-36948	7.8 HIGH	Windows Update Medic Service Elevation of Privilege Vulnerability
CVE-2021-36927	7.8 HIGH	Windows Digital TV Tuner device registration application Elevation of Privilege Vulnerabil
CVE-2021-34484	7.8 HIGH	Windows User Profile Service Elevation of Privilege Vulnerability
CVE-2021-34537	7.8 HIGH	Windows Bluetooth Driver Elevation of Privilege Vulnerability
CVE-2021-34478	7.8 HIGH	Microsoft Office Remote Code Execution Vulnerability
CVE-2021-34533	7.8 HIGH	Windows Graphics Component Font Parsing Remote Code Execution Vulnerability
CVE-2021-36958	7.8 HIGH	Windows Print Spooler Remote Code Execution Vulnerability
CVE-2021-34530	7.8 HIGH	Windows Graphics Component Remote Code Execution Vulnerability
CVE-2021-34486	7.8 HIGH	Windows Event Tracing Elevation of Privilege Vulnerability

Showing top 20 of 45 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Windows Server 2008 R2 Service Pack 1

Same vendor: Microsoft

V. Comments for CVE-2021-36942

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CVE-2021-36942— Windows LSA Spoofing Vulnerability

Public Exploits 1

Possible ATT&CK Techniques 1AI

Affected Version Matrix 14

I. Basic Information for CVE-2021-36942

Vulnerability Information

Vulnerability Title

Vulnerability Description

CVSS Information

Vulnerability Type

Vulnerability Title

Vulnerability Description

CVSS Information

Vulnerability Type

Shenlong Deep Dive — AI Deep Analysis

Affected Products

II. Public POCs for CVE-2021-36942

III. Intelligence Information for CVE-2021-36942

Vendor Advisories for CVE-2021-36942 (3)

Same Patch Batch · Microsoft · 2021-08-12 · 45 CVEs total

IV. Related Vulnerabilities

V. Comments for CVE-2021-36942

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