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.
Attack Parameters
Impact Assessment
CVSS Vector v3.1
Weakness Type (CWE)
Vulnerable Products 23
| Configuration | From (including) | Up to (excluding) |
|---|---|---|
|
Microsoft Windows_10_1607
cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x64:*
|
— |
10.0.14393.8783
|
|
Microsoft Windows_10_1607
cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x86:*
|
— |
10.0.14393.8783
|
|
Microsoft Windows_10_1809
cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x64:*
|
— |
10.0.17763.8276
|
|
Microsoft Windows_10_1809
cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:*
|
— |
10.0.17763.8276
|
|
Microsoft Windows_10_21h2
cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:arm64:*
|
— |
10.0.19044.6809
|
|
Microsoft Windows_10_21h2
cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:x64:*
|
— |
10.0.19044.6809
|
|
Microsoft Windows_10_21h2
cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:x86:*
|
— |
10.0.19044.6809
|
|
Microsoft Windows_10_22h2
cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:arm64:*
|
— |
10.0.19045.6809
|
|
Microsoft Windows_10_22h2
cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:x64:*
|
— |
10.0.19045.6809
|
|
Microsoft Windows_10_22h2
cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:x86:*
|
— |
10.0.19045.6809
|
|
Microsoft Windows_11_23h2
cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:arm64:*
|
— |
10.0.22631.6491
|
|
Microsoft Windows_11_23h2
cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:x64:*
|
— |
10.0.22631.6491
|
|
Microsoft Windows_11_24h2
cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:arm64:*
|
— |
10.0.26100.7623
|
|
Microsoft Windows_11_24h2
cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:x64:*
|
— |
10.0.26100.7623
|
|
Microsoft Windows_11_25h2
cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:arm64:*
|
— |
10.0.26200.7623
|
|
Microsoft Windows_11_25h2
cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:x64:*
|
— |
10.0.26200.7623
|
|
Microsoft Windows_Server_2012
cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:*
|
— | — |
|
Microsoft Windows_Server_2012
cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:*
|
— | — |
|
Microsoft Windows_Server_2016
cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*
|
— |
10.0.14393.8783
|
|
Microsoft Windows_Server_2019
cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*
|
— |
10.0.17763.8276
|
|
Microsoft Windows_Server_2022
cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*
|
— |
10.0.20348.4648
|
|
Microsoft Windows_Server_2022_23h2
cpe:2.3:o:microsoft:windows_server_2022_23h2:*:*:*:*:*:*:*:*
|
— |
10.0.25398.2092
|
|
Microsoft Windows_Server_2025
cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*
|
— |
10.0.26100.32230
|