CVE-2026-45601: CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') 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 (CVE-2026-45601) is a use-after-free condition in the Windows Ancillary Function Driver for WinSock on Windows 10 Version 1607 (build 10.0.14393.0). It arises from improper synchronization during concurrent execution, classified under CWE-362. Exploitation requires local access with low privileges but no user interaction. Successful exploitation can lead to elevation of privileges, compromising confidentiality, integrity, and availability. Microsoft has published an official fix to address this issue.
Potential Impact
An authorized local attacker can exploit this use-after-free vulnerability to elevate privileges on the affected Windows 10 Version 1607 system. This could allow the attacker to execute code with higher privileges, potentially leading to full system compromise. The CVSS v3.1 base score is 7.0 (high), reflecting high impact on confidentiality, integrity, and availability.
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-2026-45601 to remediate this vulnerability.
CVE-2026-45601: CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') 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 (CVE-2026-45601) is a use-after-free condition in the Windows Ancillary Function Driver for WinSock on Windows 10 Version 1607 (build 10.0.14393.0). It arises from improper synchronization during concurrent execution, classified under CWE-362. Exploitation requires local access with low privileges but no user interaction. Successful exploitation can lead to elevation of privileges, compromising confidentiality, integrity, and availability. Microsoft has published an official fix to address this issue.
Potential Impact
An authorized local attacker can exploit this use-after-free vulnerability to elevate privileges on the affected Windows 10 Version 1607 system. This could allow the attacker to execute code with higher privileges, potentially leading to full system compromise. The CVSS v3.1 base score is 7.0 (high), reflecting high impact on confidentiality, integrity, and availability.
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-2026-45601 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-05-12T19:55:45.730Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45601","vendor":"Microsoft"}]
Threat ID: 6a284ce48dd33fbd85664e5e
Added to database: 6/9/2026, 5:27:00 PM
Last enriched: 6/9/2026, 6:56:10 PM
Last updated: 6/10/2026, 5:44:56 AM
Views: 5
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