CVE-2026-27921: CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') in Microsoft Windows 10 Version 1607
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows TCP/IP allows an authorized attacker to elevate privileges locally.
AI Analysis
Technical Summary
This vulnerability involves a race condition (CWE-362) in the TCP/IP implementation of Microsoft Windows 10 Version 1607 (build 10.0.14393.0). Improper synchronization when concurrently accessing shared resources can be exploited by an authorized local attacker to elevate privileges. The issue is addressed by an official patch from Microsoft as detailed in their security update guide.
Potential Impact
Successful exploitation allows a local attacker with limited privileges to elevate their privileges on the affected system. This can lead to full system compromise, including confidentiality, integrity, and availability impacts as indicated by the CVSS vector (C:H/I:H/A:H). There are no known exploits in the wild at this time.
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-2026-27921 to remediate this vulnerability.
CVE-2026-27921: CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') in Microsoft Windows 10 Version 1607
Description
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows TCP/IP allows an authorized attacker to elevate privileges locally.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves a race condition (CWE-362) in the TCP/IP implementation of Microsoft Windows 10 Version 1607 (build 10.0.14393.0). Improper synchronization when concurrently accessing shared resources can be exploited by an authorized local attacker to elevate privileges. The issue is addressed by an official patch from Microsoft as detailed in their security update guide.
Potential Impact
Successful exploitation allows a local attacker with limited privileges to elevate their privileges on the affected system. This can lead to full system compromise, including confidentiality, integrity, and availability impacts as indicated by the CVSS vector (C:H/I:H/A:H). There are no known exploits in the wild at this time.
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-2026-27921 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-02-24T21:35:49.687Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-27921","vendor":"Microsoft"}]
Threat ID: 69de7a2482d89c981fd6b9f0
Added to database: 4/14/2026, 5:32:20 PM
Last enriched: 4/14/2026, 6:47:48 PM
Last updated: 4/15/2026, 6:06:33 AM
Views: 3
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