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Microsoft Windows DCOM Server CVE-2021-26414 Security Feature Bypass Vulnerability

description-logoDescription

A Windows DCOM server security feature bypass allows a malicious server to be activated by a user, enabling integrity compromise; the root cause is missing enforcement of RPC_C_AUTHN_LEVEL_PKT_INTEGRITY, and Microsoft has released phased updates for Windows 10, 11, Server 2016-2022.

affected-products-logoAffected Applications

Windows Server version 20H2 (Server Core Installation)
Windows RT 8.1
Windows Server version 2004 (Server Core installation)
Windows Server 2016
Windows Server 2012
Windows 8
Windows 7
Windows 10
Windows Server 2008
Windows Server 2019

Version Updates

Date Version Status Detail
2021-06-09 1.00247
New
 Windows Server, version 20H2 (Server Core Installation),Windows RT 8.
1,Windows Server, version 2004 (Server Core installation),Windows Server 2016,Windows Server 2012,Windows 8,Windows 7,Windows 10,Windows Server 2008,Windows Server 2019

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-26414
ID 67844
Created Jun 08, 2021
Description
Updated		 Jan 10, 2026
CVE ID
Risk black-background-circle-icon black-background-circle-icon black-background-circle-icon lightgray-background-circle-icon lightgray-background-circle-icon
Coverage FortiClient
OS Windows
Vendor Microsoft
Patch auto
Application Windows Server version 20H2 (Server Core Installation) , Windows RT 8.1 , Windows Server version 2004 (Server Core installation) , Windows Server 2016 , Windows Server 2012 , Windows 8 , Windows 7 , Windows 10 , Windows Server 2008 , Windows Server 2019