CVE-2026-0390 json
UEFI Secure Boot Security Feature Bypass Vulnerability
published 2026-04-14 6 mo ago modified 2026-10-25 14 d ago also EUVD-2026-22350
- cvss
- 6.7
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 24%
- public exploits
- 0
- none known
Summary
Reliance on untrusted inputs in a security decision in Windows Boot Loader allows an authorized attacker to bypass a security feature locally.
Patch / fix
- Microsoft Windows 10 Version 1607 10.0.14393.9060
- Microsoft Windows 10 Version 1809 10.0.17763.8644
- Microsoft Windows 10 Version 21H2 10.0.19044.7184
- Microsoft Windows 10 Version 22H2 10.0.19045.7184
- Microsoft Windows Server 2016 10.0.14393.9060
- Microsoft Windows Server 2016 (Server Core installation) 10.0.14393.9060
- Microsoft Windows Server 2019 10.0.17763.8644
- Microsoft Windows Server 2019 (Server Core installation) 10.0.17763.8644
- Microsoft Windows Server 2022 10.0.20348.5020
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 6 mo ago
Exploit prediction
0.32% chance of exploitation in the next 30 days, higher than 24% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.7 | 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 |
| CNA | 3.1 | 6.7 | CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H |
Affected products
- Microsoft Windows 10 Version 1607
- Microsoft Windows 10 Version 1809
- Microsoft Windows 10 Version 21H2
- Microsoft Windows 10 Version 22H2
- Microsoft Windows Server 2016
- Microsoft Windows Server 2016 (Server Core installation)
- Microsoft Windows Server 2019
- Microsoft Windows Server 2019 (Server Core installation)
- Microsoft Windows Server 2022
Classification
- Weakness
-
- CWE-807 Reliance on Untrusted Inputs in a Security Decision
References
-
msrc.microsoft.com
/update-guide/vulnerability/CVE-2026-0390
vendor-advisory, patch
Sources
- CVE List CVE-2026-0390
- NVD CVE-2026-0390
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.