CVE-2026-49783
Secure Boot Security Feature Bypass Vulnerability
Improperly implemented security check for standard in Windows Secure Boot allows an authorized attacker to bypass a security feature locally.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
Secure Boot Security Feature Bypass Vulnerability
Improperly implemented security check for standard in Windows Secure Boot allows an authorized attacker to bypass a security feature locally.
- Record
CVE-2026-49783- CVSS 3.1
- 7.8 High
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C - Weakness
- CWE-358
- Updated
- 2026-11-02
EUVDEUVD-2026-43801
Improperly implemented security check for standard in Windows Secure Boot allows an authorized attacker to bypass a security feature locally.
- Record
EUVD-2026-43801- CVSS 3.1
- 7.8 High
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-vm4m-9p6f-gcg7
Improperly implemented security check for standard in Windows Secure Boot allows an authorized...
Improperly implemented security check for standard in Windows Secure Boot allows an authorized attacker to bypass a security feature locally.
- Record
GHSA-vm4m-9p6f-gcg7- CVSS 3.1
- 7.8 High
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-358
- Updated
- 2026-11-02
NVD
Improperly implemented security check for standard in Windows Secure Boot allows an authorized attacker to bypass a security feature locally.
- Record
CVE-2026-49783- CVSS 3.1
- 7.8 High
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-358
- Updated
- 2026-11-02
Affected products
- microsoft windows 10 version 1607
- microsoft windows 10 version 1809
- microsoft windows 10 version 21h2
- microsoft windows 10 version 22h2
- microsoft windows 11 version 24h2
- microsoft windows 11 version 25h2
- microsoft windows 11 version 26h1
- 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
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-49783 is a high vulnerability (CVSS 7.8) in Microsoft Windows 10 Version 1607, published July 14, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.33%, the 26th percentile. No source names a fixed version.