Concurrent execution using shared resource with improper synchronization ('race condition') in Windows TCP/IP allows an unauthorized attacker to execu...
Description
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows TCP/IP allows an unauthorized attacker to execute code over a network
AI Analyst Comment
Remediation
Apply vendor security updates immediately. Monitor for exploitation attempts and review access logs.
Description Summary:
A race condition in the Windows TCP/IP stack allows an unauthenticated remote attacker to execute arbitrary code on the affected system.
Executive Summary:
A critical race condition vulnerability in the Windows TCP/IP stack permits unauthenticated remote code execution, posing a severe risk to system integrity and availability.
Vulnerability Details
CVE-ID: CVE-2026-33827
Affected Software: Microsoft Windows
Affected Versions: Microsoft Windows 10 Version 1607 (10.0.14393.0 up to 10.0.14393.9060), Version 1809 (10.0.17763.0 up to 10.0.17763.8644), Version 21H2 (10.0.19044.0 up to 10.0.19044.7184), Version 22H2 (10.0.19045.0 up to 10.0.19045.7184); Microsoft Windows 11 Version 22H3 (10.0.22631.0 up to 10.0.22631.6936), Version 23H2 (10.0.22631.0 up to 10.0.22631.6936)
Vulnerability: This is a race condition (CWE-362) occurring within the Windows TCP/IP implementation. It allows an unauthenticated, remote attacker to trigger improper synchronization, potentially leading to arbitrary code execution.
Business Impact
The vulnerability carries a CVSS score of 8.1, indicating a high severity due to the potential for full system compromise. Successful exploitation could lead to unauthorized access, total data loss, and significant service disruption, as an attacker can execute code remotely without requiring user interaction or authentication.
Remediation Plan
Immediate Action: Administrators must apply the latest security updates provided by Microsoft in the official update guide to patch the vulnerable TCP/IP stack.
Proactive Monitoring: Security teams should monitor network traffic for suspicious patterns targeting common Windows networking ports and review system logs for signs of unauthorized process execution or anomalous service behavior.
Compensating Controls: Deploying a network-based intrusion detection system or a properly configured firewall to restrict unnecessary external access to the Windows TCP/IP stack can help reduce the attack surface until patches are applied.
Exploitation Status
Public Exploit Available: Unknown
Analyst Notes: As of April 16, 2026, there is no public information indicating active exploitation or a public proof-of-concept for this vulnerability. While the race condition is complex to trigger, the potential for remote code execution makes this a high-priority item for remediation.
Analyst Recommendation
Given the high CVSS score and the nature of the vulnerability in a core networking component, immediate patching is essential to prevent potential exploitation. Organizations should prioritize the deployment of the vendor-supplied updates across all identified Windows versions to ensure the long-term security and stability of their infrastructure.