Race Condition in Windows TCP/IP Enables Remote Code Execution

Publication date: 2026-04-14

Last updated on: 2026-04-17

Assigner: Microsoft Corporation

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.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-04-14

Last Modified

2026-04-17

Generated

2026-07-06

AI Q&A

2026-04-14

EPSS Evaluated

2026-07-05

NVD

CVE-2026-33827

EUVD

EUVD-2026-22647

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	windows_server_2012	r2
microsoft	windows_server_2012	*
microsoft	windows_10_1607	to 10.0.14393.9060 (exc)
microsoft	windows_10_1607	to 10.0.14393.9060 (exc)
microsoft	windows_10_1809	to 10.0.17763.8644 (exc)
microsoft	windows_10_1809	to 10.0.17763.8644 (exc)
microsoft	windows_10_21h2	to 10.0.19044.7184 (exc)
microsoft	windows_10_21h2	to 10.0.19044.7184 (exc)
microsoft	windows_10_21h2	to 10.0.19044.7184 (exc)
microsoft	windows_10_22h2	to 10.0.19045.7184 (exc)
microsoft	windows_10_22h2	to 10.0.19045.7184 (exc)
microsoft	windows_10_22h2	to 10.0.19045.7184 (exc)
microsoft	windows_11_23h2	to 10.0.22631.6936 (exc)
microsoft	windows_11_23h2	to 10.0.22631.6936 (exc)
microsoft	windows_11_24h2	to 10.0.26100.8246 (exc)
microsoft	windows_11_24h2	to 10.0.26100.8246 (exc)
microsoft	windows_11_25h2	to 10.0.26200.8246 (exc)
microsoft	windows_11_25h2	to 10.0.26200.8246 (exc)
microsoft	windows_11_26h1	to 10.0.28000.1836 (exc)
microsoft	windows_11_26h1	to 10.0.28000.1836 (exc)
microsoft	windows_server_2016	to 10.0.14393.9060 (exc)
microsoft	windows_server_2019	to 10.0.17763.8644 (exc)
microsoft	windows_server_2022	to 10.0.20348.5020 (exc)
microsoft	windows_server_2022_23h2	to 10.0.25398.2274 (exc)
microsoft	windows_server_2025	to 10.0.26100.32690 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-362	The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.

Attack-Flow Graph

Executive Summary

This vulnerability is a race condition in the Windows TCP/IP stack caused by concurrent execution using a shared resource without proper synchronization. This flaw allows an unauthorized attacker to execute code remotely over a network.

Impact Analysis

The vulnerability can have a severe impact as it allows an attacker to execute arbitrary code remotely without any user interaction or privileges. This can lead to complete compromise of the affected system, including unauthorized access, data theft, or disruption of services.

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