CVE-2026-33099: CWE-416: Use After Free in Microsoft Windows 10 Version 1607
Use after free in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.
AI Analysis
Technical Summary
This vulnerability involves a use-after-free condition in the Windows Ancillary Function Driver for WinSock on Windows 10 Version 1607 (build 10.0.14393.0). Exploitation requires local access with low privileges and no user interaction. Successful exploitation could allow an attacker to elevate privileges, impacting confidentiality, integrity, and availability. Microsoft has published an official fix for this vulnerability.
Potential Impact
An authorized local attacker could exploit this use-after-free vulnerability to elevate their privileges on the affected system. This could lead to full compromise of the affected Windows 10 Version 1607 system, impacting confidentiality, integrity, and availability of the system.
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-2026-33099 to remediate this vulnerability.
CVE-2026-33099: CWE-416: Use After Free in Microsoft Windows 10 Version 1607
Description
Use after free in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.
CVSS v3.1
Score 7.0high
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves a use-after-free condition in the Windows Ancillary Function Driver for WinSock on Windows 10 Version 1607 (build 10.0.14393.0). Exploitation requires local access with low privileges and no user interaction. Successful exploitation could allow an attacker to elevate privileges, impacting confidentiality, integrity, and availability. Microsoft has published an official fix for this vulnerability.
Potential Impact
An authorized local attacker could exploit this use-after-free vulnerability to elevate their privileges on the affected system. This could lead to full compromise of the affected Windows 10 Version 1607 system, impacting confidentiality, integrity, and availability of the system.
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-2026-33099 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-03-17T20:15:23.718Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-33099","vendor":"Microsoft"}]
Threat ID: 69de7a3a82d89c981fd6cf1a
Added to database: 4/14/2026, 5:32:42 PM
Last enriched: 5/19/2026, 10:50:36 AM
Last updated: 5/31/2026, 5:03:14 AM
Views: 49
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