CVE-2026-49783: CWE-358: Improperly Implemented Security Check for Standard in Microsoft Windows 10 Version 1607
Improperly implemented security check for standard in Windows Secure Boot allows an authorized attacker to bypass a security feature locally.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-49783) is classified as CWE-358, indicating an improperly implemented security check in the Windows Secure Boot process on Windows 10 Version 1607 (build 10.0.14393.0). The flaw allows an attacker with local authorized access to bypass security features designed to protect the boot process. The vulnerability has a CVSS 3.1 score of 7.8, reflecting high impact on confidentiality, integrity, and availability. Microsoft has released an official fix to address this issue, as documented in their security update guide.
Potential Impact
An authorized local attacker can bypass security features in Windows Secure Boot, potentially compromising system integrity, confidentiality, and availability. This could allow unauthorized code execution or persistence during system startup, undermining the security guarantees of Secure Boot.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-49783 to remediate this vulnerability.
CVE-2026-49783: CWE-358: Improperly Implemented Security Check for Standard in Microsoft Windows 10 Version 1607
Description
Improperly implemented security check for standard in Windows Secure Boot allows an authorized attacker to bypass a security feature locally.
CVSS v3.1
Score 7.8high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-49783) is classified as CWE-358, indicating an improperly implemented security check in the Windows Secure Boot process on Windows 10 Version 1607 (build 10.0.14393.0). The flaw allows an attacker with local authorized access to bypass security features designed to protect the boot process. The vulnerability has a CVSS 3.1 score of 7.8, reflecting high impact on confidentiality, integrity, and availability. Microsoft has released an official fix to address this issue, as documented in their security update guide.
Potential Impact
An authorized local attacker can bypass security features in Windows Secure Boot, potentially compromising system integrity, confidentiality, and availability. This could allow unauthorized code execution or persistence during system startup, undermining the security guarantees of Secure Boot.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-49783 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-06-01T17:02:37.207Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-49783","vendor":"Microsoft"}]
Threat ID: 6a566f6d68715ace43e6b51e
Added to database: 07/14/2026, 17:18:37 UTC
Last enriched: 08/13/2026, 14:22:55 UTC
Last updated: 08/25/2026, 22:52:12 UTC
Views: 46
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