CVE-2026-45598

Published: Jun 9, 2026Modified: Jul 9, 2026

7.0

Vector

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploitability: 1.0 / Impact: 5.9

Source: secure@microsoft.com (Secondary)

Description

Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.

Affected (24)

Products: Microsoft: Windows 10 1607, Windows 10 1809, Windows 10 21h2, Windows 10 22h2, Windows 11 23h2, Windows 11 24h2, Windows 11 25h2, Windows 11 26h1, Windows Server 2012, Windows Server 2016, Windows Server 2019, Windows Server 2022, Windows Server 2025

13 products

Configuration A

24 vulnerable

Vulnerable Software	Affected Versions
Microsoft Windows 10 1607	version < 10.0.14393.9234
Microsoft Windows 10 1607	version < 10.0.14393.9234
Microsoft Windows 10 1809	version < 10.0.17763.8880
Microsoft Windows 10 1809	version < 10.0.17763.8880
Microsoft Windows 10 21h2	version < 10.0.19044.7417
Microsoft Windows 10 21h2	version < 10.0.19044.7417
Microsoft Windows 10 21h2	version < 10.0.19044.7417
Microsoft Windows 10 22h2	version < 10.0.19045.7417
Microsoft Windows 10 22h2	version < 10.0.19045.7417
Microsoft Windows 10 22h2	version < 10.0.19045.7417
Microsoft Windows 11 23h2	version < 10.0.22631.7219
Microsoft Windows 11 23h2	version < 10.0.22631.7219
Microsoft Windows 11 24h2	version < 10.0.26100.8655
Microsoft Windows 11 24h2	version < 10.0.26100.8655
Microsoft Windows 11 25h2	version < 10.0.26200.8655
Microsoft Windows 11 25h2	version < 10.0.26200.8655
Microsoft Windows 11 26h1	version < 10.0.28000.2269
Microsoft Windows 11 26h1	version < 10.0.28000.2269
Microsoft Windows Server 2012	All versions
Microsoft Windows Server 2012	Version r2
Microsoft Windows Server 2016	version < 10.0.14393.9234
Microsoft Windows Server 2019	version < 10.0.17763.8880
Microsoft Windows Server 2022	version < 10.0.20348.5256
Microsoft Windows Server 2025	version < 10.0.26100.32995

Related CWEs

CWE-362

Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

The product contains a code sequence that can run concurrently with other code, and the code sequence 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 that is operating concurrently.

References (1)

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45598

Source: secure@microsoft.com

Vendor Advisory

Timeline

No history available yet.