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High · 7.5 Known exploited · Ransomware Publicly disclosed Public exploit CVE-2021-36942 EUVD-2021-23518GHSA-p8qf-gcxq-47xm

Windows LSA Spoofing Vulnerability

Published Aug 12, 2021 · Updated Aug 10, 2026 · Assigned by microsoft

Vendor: Microsoft Product: Windows Server 2008 R2 Service Pack 1 Product: Windows Server 2008 R2 Service Pack 1 (Server Core installation) Product: Windows Server 2008 Service Pack 2 Product: Windows Server 2008 Service Pack 2 (Server Core installation) Product: Windows Server 2012 Product: Windows Server 2012 (Server Core installation) Product: Windows Server 2012 R2 Product: Windows Server 2012 R2 (Server Core installation) Product: Windows Server 2016 Product: Windows Server 2016 (Server Core installation) Product: Windows Server 2019 Product: Windows Server 2019 (Server Core installation) Product: Windows Server version 2004 Product: Windows Server version 20H2 Platform: Windows

Description

Windows LSA Spoofing Vulnerability

Affected products

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

Public exploits

Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.

Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.

Metasploit 1 module

Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.

Advisories 1

References