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Medium 6.7Published Apr 14, 2026
CVE-2026-0390UEFI Secure Boot Security Feature Bypass Vulnerability
Updated under an hour ago ()
Does this affect you?
It affects Microsoft Windows 10 Version 1607 and 6 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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Reliance on untrusted inputs in a security decision in Windows Boot Loader allows an authorized attacker to bypass a security feature locally.
- CVSS
- 6.7 MEDIUM (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
- Weakness (CWE)
- CWE-807
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- microsoft
- NVD analysis
- Analyzed
- Record last updated
- Oct 15, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Microsoft Windows 10 Version 1607 microsoft:windows_10_1607 | from 10.0.14393.0 before 10.0.14393.9060 | CNA record |
Microsoft Windows 10 Version 1809 microsoft:windows_10_1809 | from 10.0.17763.0 before 10.0.17763.8644 | CNA record |
Microsoft Windows 10 Version 21H2 microsoft:windows_10_21h2 | from 10.0.19044.0 before 10.0.19044.7184 | CNA record |
Microsoft Windows 10 Version 22H2 microsoft:windows_10_22h2 | from 10.0.19045.0 before 10.0.19045.7184 | CNA record |
Microsoft Windows Server 2016 microsoft:windows_server_2016 (from the name) | from 10.0.14393.0 before 10.0.14393.9060 | CNA record |
Microsoft Windows Server 2019 microsoft:windows_server_2019 (from the name) | from 10.0.17763.0 before 10.0.17763.8644 | CNA record |
Microsoft Windows Server 2022 microsoft:windows_server_2022 (from the name) | from 10.0.20348.0 before 10.0.20348.5020 | CNA record |
microsoft windows_10_1607 microsoft:windows_10_1607 | before 10.0.14393.9060; before 10.0.14393.9060 | NVD |
microsoft windows_10_1809 microsoft:windows_10_1809 | before 10.0.17763.8644; before 10.0.17763.8644 | NVD |
microsoft windows_10_21h2 microsoft:windows_10_21h2 | before 10.0.19044.7184; before 10.0.19044.7184; before 10.0.19044.7184 | NVD |
microsoft windows_10_22h2 microsoft:windows_10_22h2 | before 10.0.19045.7184; before 10.0.19045.7184; before 10.0.19045.7184 | NVD |
microsoft windows_server_2016 microsoft:windows_server_2016 | before 10.0.14393.9060 | NVD |
microsoft windows_server_2019 microsoft:windows_server_2019 | before 10.0.17763.8644 | NVD |
microsoft windows_server_2022 microsoft:windows_server_2022 | before 10.0.20348.5020 | NVD |
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-0390vendor-advisory, patch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.