CVE-2026-56643: CWE-416: Use After Free in Microsoft Windows 10 Version 1607
Use after free in Windows Kernel allows an authorized attacker to elevate privileges locally.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-56643) involves a use-after-free condition in the Windows Kernel on Windows 10 Version 1607 (build 10.0.14393.0). An authorized local attacker can exploit this flaw to elevate their privileges on the affected system. The vulnerability has a CVSS 3.1 base score of 7.8, indicating high impact on confidentiality, integrity, and availability. Microsoft has released an official fix to address this issue.
Potential Impact
Successful exploitation of this vulnerability allows an authorized local attacker to elevate privileges, potentially gaining higher system rights. This can lead to full system compromise, including unauthorized access to sensitive data and control over system operations.
Mitigation Recommendations
An official fix is available from Microsoft. It is recommended to apply the security update provided by Microsoft for Windows 10 Version 1607 (build 10.0.14393.0) as detailed in the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-56643.
CVE-2026-56643: CWE-416: Use After Free in Microsoft Windows 10 Version 1607
Description
Use after free in Windows Kernel allows an authorized attacker to elevate privileges locally.
CVSS v3.1
Score 7.8high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-56643) involves a use-after-free condition in the Windows Kernel on Windows 10 Version 1607 (build 10.0.14393.0). An authorized local attacker can exploit this flaw to elevate their privileges on the affected system. The vulnerability has a CVSS 3.1 base score of 7.8, indicating high impact on confidentiality, integrity, and availability. Microsoft has released an official fix to address this issue.
Potential Impact
Successful exploitation of this vulnerability allows an authorized local attacker to elevate privileges, potentially gaining higher system rights. This can lead to full system compromise, including unauthorized access to sensitive data and control over system operations.
Mitigation Recommendations
An official fix is available from Microsoft. It is recommended to apply the security update provided by Microsoft for Windows 10 Version 1607 (build 10.0.14393.0) as detailed in the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-56643.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-06-22T15:17:38.795Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-56643","vendor":"Microsoft"}]
Threat ID: 6a5676bc68715ace43f0af61
Added to database: 07/14/2026, 17:49:48 UTC
Last enriched: 07/14/2026, 18:37:22 UTC
Last updated: 07/15/2026, 04:18:39 UTC
Views: 4
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