CVE-2021-36942: Windows LSA Spoofing Vulnerability

Published Aug 12, 2021
·
Updated

Microsoft Windows Local Security Authority (LSA) contains a spoofing vulnerability allowing an unauthenticated attacker to call a method on the LSARPC interface and coerce the domain controller to authenticate against another server using NTLM.

Affected Software

13 affected components
Microsoft Windows Server 2008=sp2
Microsoft Windows Server 2008=r2-sp1
Microsoft Windows Server 2012
Microsoft Windows Server 2012=r2
Microsoft Windows Server 2016
Microsoft Windows Server 2016=20h2
Microsoft Windows Server 2016=2004
Microsoft Windows Server 2019
Microsoft Windows Server 2004<10.0.19041.1165
Microsoft Windows Server 2016<10.0.14393.4583
Microsoft Windows Server 2019<10.0.17763.2114
Microsoft Windows Server 20h2<10.0.19042.1165
Microsoft Windows

Event History

Aug 12, 2021
CVE Published
via MITRE·06:12 PM
Data Sourced
via MITRE·06:12 PM
DescriptionSeverity
Data Sourced
via NVD·06:15 PM
RemedyDescriptionSeverityAffected Software
Nov 3, 2021
Known Exploited
via CISA·12:00 AM
Known Ransomware
via CISA·12:00 AM
Oct 22, 2025
News Published
via BleepingComputer·10:24 AM
News Published
via BleepingComputer·10:25 AM
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Frequently Asked Questions

1

What is the severity of CVE-2021-36942?

CVE-2021-36942 has a severity rating of critical, allowing unauthenticated attackers to exploit the vulnerability.

2

How do I fix CVE-2021-36942?

To mitigate CVE-2021-36942, apply the security updates provided by Microsoft for the affected Windows versions.

3

What versions of Windows are affected by CVE-2021-36942?

CVE-2021-36942 affects various Windows Server versions, including 2004, 2008, 2012, 2016, 2019, and 20H2.

4

Can CVE-2021-36942 be exploited remotely?

Yes, CVE-2021-36942 can be exploited remotely by an unauthenticated attacker to perform unauthorized actions.

5

What type of attack is associated with CVE-2021-36942?

CVE-2021-36942 involves a spoofing vulnerability that allows attackers to coerce authentication through the LSARPC interface.

Contact

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