CVE-2021-36942

Windows LSA Spoofing Vulnerability

CVE-2021-36942 is fixed in 16 products on 1 platform, first by KB5005043, released August 10, 2021. It is being exploited: CISA added it to the Known Exploited Vulnerabilities catalog on November 3, 2021, with known ransomware use. Patch Radar priority: Patch now.

Patch nowCISA KEVKnown ransomware usePublicly disclosed

CVSS

7.5

Important

Exploitation

Exploited

Listed by CISA

CISA KEV

Nov 3, 2021

Federal due date Nov 17, 2021. Known ransomware use

EPSS

0.6602

99th percentile

Where it's fixed

Product	Fixed in	Fix	Released
Microsoft
Windows Server 2008 R2 for x64-based Systems Service Pack 1		KB5005089	Aug 10, 2021
Windows Server 2008 R2 for x64-based Systems Service Pack 1		KB5005088	Aug 10, 2021
Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)		KB5005089	Aug 10, 2021
Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)		KB5005088	Aug 10, 2021
Windows Server 2008 for 32-bit Systems Service Pack 2		KB5005095	Aug 10, 2021
Windows Server 2008 for 32-bit Systems Service Pack 2		KB5005090	Aug 10, 2021
Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation)		KB5005095	Aug 10, 2021
Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation)		KB5005090	Aug 10, 2021
Windows Server 2008 for x64-based Systems Service Pack 2		KB5005095	Aug 10, 2021
Windows Server 2008 for x64-based Systems Service Pack 2		KB5005090	Aug 10, 2021
Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation)		KB5005095	Aug 10, 2021
Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation)		KB5005090	Aug 10, 2021
Windows Server 2012		KB5005099	Aug 10, 2021
Windows Server 2012		KB5005094	Aug 10, 2021
Windows Server 2012 (Server Core installation)		KB5005099	Aug 10, 2021
Windows Server 2012 (Server Core installation)		KB5005094	Aug 10, 2021
Windows Server 2012 R2		KB5005076	Aug 10, 2021
Windows Server 2012 R2		KB5005106	Aug 10, 2021
Windows Server 2012 R2 (Server Core installation)		KB5005076	Aug 10, 2021
Windows Server 2012 R2 (Server Core installation)		KB5005106	Aug 10, 2021
Windows Server 2016	14393.4583	KB5005043	Aug 10, 2021
Windows Server 2016 (Server Core installation)	14393.4583	KB5005043	Aug 10, 2021
Windows Server 2019	17763.2114	KB5005030	Aug 10, 2021
Windows Server 2019 (Server Core installation)	17763.2114	KB5005030	Aug 10, 2021
Windows Server, version 2004 (Server Core installation)		KB5005033	Aug 10, 2021
Windows Server, version 20H2 (Server Core Installation)		KB5005033	Aug 10, 2021

Details

Published
August 10, 2021
CISA required action
Apply updates per vendor instructions.
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-36942

For tools and AI agents

This page as data: JSON · Markdown

Link to this page

If this page saved you time, a link to it in your ticket, advisory or write-up helps others find it.

HTML

<a href="https://patchblox.com/security/cve/CVE-2021-36942">CVE-2021-36942 on Patchblox Patch Radar</a>

Reusing the data? How to credit Patch Radar.

Is this on your machines?

Patchblox finds every install below the fixed version on Windows, macOS and Linux, and updates them through your release rings.

Get a demo

Patch Radar data is free to use with attribution. Terms and how to credit it.

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.