CVE-2026-45598: 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-2026-45598) 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 (race condition). Exploiting this flaw allows a local attacker with some authorization to escalate privileges on the affected system. The CVSS 3.1 base score is 7.0, reflecting high severity with high impact on confidentiality, integrity, and availability. Microsoft has released an official fix to remediate this vulnerability.
Potential Impact
Successful exploitation permits an authorized local attacker to elevate privileges, potentially gaining higher system rights than intended. This can lead to full system compromise or unauthorized actions with elevated privileges. The vulnerability affects 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-2026-45598 to remediate this vulnerability. No additional mitigation steps are indicated by the vendor.
CVE-2026-45598: 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-2026-45598) 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 (race condition). Exploiting this flaw allows a local attacker with some authorization to escalate privileges on the affected system. The CVSS 3.1 base score is 7.0, reflecting high severity with high impact on confidentiality, integrity, and availability. Microsoft has released an official fix to remediate this vulnerability.
Potential Impact
Successful exploitation permits an authorized local attacker to elevate privileges, potentially gaining higher system rights than intended. This can lead to full system compromise or unauthorized actions with elevated privileges. The vulnerability affects 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-2026-45598 to remediate this vulnerability. No additional mitigation steps are indicated by the vendor.
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-2026-45598","vendor":"Microsoft"}]
Threat ID: 6a284ce18dd33fbd85664e0f
Added to database: 6/9/2026, 5:26:57 PM
Last enriched: 6/9/2026, 7:10:45 PM
Last updated: 6/10/2026, 6:03:56 AM
Views: 4
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