Description
Windows Secure Boot stores Microsoft certificates in the UEFI KEK and DB. These original certificates are approaching expiration, and devices containing affected certificate versions must update them to maintain Secure Boot functionality and avoid compromising security by losing security fixes related to Windows boot manager or Secure Boot. The operating system’s certificate update protection mechanism relies on firmware components that might contain defects, which can cause certificate trust updates to fail or behave unpredictably. This leads to potential disruption of the Secure Boot trust chain and requires careful validation and deployment to restore intended security guarantees. Certificate Authority (CA) Location Purpose Expiration Date Microsoft Corporation KEK CA 2011 KEK Signs updates to the DB and DBX 06/24/2026 Microsoft Corporation UEFI CA 2011 DB Signs 3rd party boot loaders, Option ROMs, etc. 06/27/2026 Microsoft Windows Production PCA 2011 DB Signs the Windows Boot Manager 10/19/2026 For more information see this CVE and Windows Secure Boot certificate expiration and CA updates.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Microsoft Windows 10 Version 1607
10.0.14393.0 to < 10.0.14393.8783affected
Microsoft Windows 10 Version 1809
10.0.17763.0 to < 10.0.17763.8276affected
Microsoft Windows 10 Version 21H2
10.0.19044.0 to < 10.0.19044.6809affected
Microsoft Windows 10 Version 22H2
10.0.19045.0 to < 10.0.19045.6809affected
Microsoft Windows 11 version 23H2
10.0.22631.0 to < 10.0.22631.6491affected
Microsoft Windows 11 Version 23H2
10.0.22631.0 to < 10.0.22631.6491affected
Microsoft Windows 11 Version 24H2
10.0.26100.0 to < 10.0.26100.7623affected
Microsoft Windows 11 Version 25H2
10.0.26200.0 to < 10.0.26200.7623affected
Microsoft Windows Server 2012
6.2.9200.0 to < 6.2.9200.25868affected
Microsoft Windows Server 2012 (Server Core installation)
6.2.9200.0 to < 6.2.9200.25868affected
Microsoft Windows Server 2012 R2
6.3.9600.0 to < 6.3.9600.22968affected
Microsoft Windows Server 2012 R2 (Server Core installation)
6.3.9600.0 to < 6.3.9600.22968affected
Microsoft Windows Server 2016
10.0.14393.0 to < 10.0.14393.8783affected
Microsoft Windows Server 2016 (Server Core installation)
10.0.14393.0 to < 10.0.14393.8783affected
Microsoft Windows Server 2019
10.0.17763.0 to < 10.0.17763.8276affected
Microsoft Windows Server 2019 (Server Core installation)
10.0.17763.0 to < 10.0.17763.8276affected
Microsoft Windows Server 2022
10.0.20348.0 to < 10.0.20348.4648affected
Microsoft Windows Server 2022, 23H2 Edition (Server Core installation)
10.0.25398.0 to < 10.0.25398.2092affected
Microsoft Windows Server 2025
10.0.26100.0 to < 10.0.26100.32230affected
Microsoft Windows Server 2025 (Server Core installation)
10.0.26100.0 to < 10.0.26100.32230affected