CVE-2026-20860: CWE-843: Access of Resource Using Incompatible Type ('Type Confusion') in Microsoft Windows 10 Version 1607
Access of resource using incompatible type ('type confusion') in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-20860) arises from a type confusion error (CWE-843) in the Windows Ancillary Function Driver for WinSock on Windows 10 Version 1607 (build 10.0.14393.0). An authorized local attacker can exploit this flaw to elevate privileges on the affected system. The CVSS v3.1 base score is 7.8, reflecting high impact with local attack vector, low attack complexity, and no user interaction required. The vulnerability is not known to be exploited in the wild. Microsoft has released a patch to remediate this issue.
Potential Impact
Successful exploitation allows an authorized local attacker to elevate privileges, potentially gaining higher system rights. This can lead to full system compromise, affecting confidentiality, integrity, and availability of the system. There are no known active exploits in the wild at this time.
Mitigation Recommendations
A patch is available for this vulnerability. It is recommended to apply the official Microsoft update for Windows 10 Version 1607 (build 10.0.14393.0) to remediate the issue. Since this is a local privilege escalation vulnerability, applying the patch promptly will prevent attackers from exploiting this flaw.
CVE-2026-20860: CWE-843: Access of Resource Using Incompatible Type ('Type Confusion') in Microsoft Windows 10 Version 1607
Description
Access of resource using incompatible type ('type confusion') in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-20860) arises from a type confusion error (CWE-843) in the Windows Ancillary Function Driver for WinSock on Windows 10 Version 1607 (build 10.0.14393.0). An authorized local attacker can exploit this flaw to elevate privileges on the affected system. The CVSS v3.1 base score is 7.8, reflecting high impact with local attack vector, low attack complexity, and no user interaction required. The vulnerability is not known to be exploited in the wild. Microsoft has released a patch to remediate this issue.
Potential Impact
Successful exploitation allows an authorized local attacker to elevate privileges, potentially gaining higher system rights. This can lead to full system compromise, affecting confidentiality, integrity, and availability of the system. There are no known active exploits in the wild at this time.
Mitigation Recommendations
A patch is available for this vulnerability. It is recommended to apply the official Microsoft update for Windows 10 Version 1607 (build 10.0.14393.0) to remediate the issue. Since this is a local privilege escalation vulnerability, applying the patch promptly will prevent attackers from exploiting this flaw.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2025-12-03T05:54:20.380Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 69668ae0a60475309f9ae124
Added to database: 1/13/2026, 6:11:44 PM
Last enriched: 4/3/2026, 12:46:35 PM
Last updated: 5/10/2026, 9:31:21 AM
Views: 78
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