Secure Boot Certificate Expiration Security Feature Bypass Vulnerability (Microsoft Windows 10 Version 1607)
At a glance
- Source
- NVD
- EPSS
- EPSS 1.10 % · percentile 66 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- microsoft
- NVD status
- Analyzed
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.
Weaknesses (CWE)
- CWE-1329 — Reliance on Component That is Not Updateable
References
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | MEDIUM 6.4 | CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C | microsoft |
| CVSS 3.1 | MEDIUM 6.4 | CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H | NVD · secure@microsoft.com (Secondary) |
European references
- ENISA EUVD · EUVD-2026-2100
- GCVE · GCVE-0-2026-21265
CERT-FR advisories
- CERTFR-2026-AVI-0044 — Multiples vulnérabilités dans Microsoft Windows · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x64:*< 10.0.14393.8783cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x86:*< 10.0.14393.8783cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x64:*< 10.0.17763.8276cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:*< 10.0.17763.8276cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:arm64:*< 10.0.19044.6809cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:x64:*< 10.0.19044.6809cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:x86:*< 10.0.19044.6809cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:arm64:*< 10.0.19045.6809cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:x64:*< 10.0.19045.6809cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:x86:*< 10.0.19045.6809cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:arm64:*< 10.0.22631.6491cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:x64:*< 10.0.22631.6491cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:arm64:*< 10.0.26100.7623cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:x64:*< 10.0.26100.7623cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:arm64:*< 10.0.26200.7623cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:x64:*< 10.0.26200.7623cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:*cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:*cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*< 10.0.14393.8783cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*< 10.0.17763.8276cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*< 10.0.20348.4648cpe:2.3:o:microsoft:windows_server_2022_23h2:*:*:*:*:*:*:*:*< 10.0.25398.2092cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*< 10.0.26100.32230
Affected products
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |