CVE-2026-45657

CRITICAL

Microsoft Windows 11 version 23H2 - Windows Kernel Remote Code Execution Vulnerability

Title source: rule
STIX 2.1

Description

Use after free in Windows Kernel allows an unauthorized attacker to execute code over a network.

References (1)

Core 1
Core References
Vendor Advisory vendor-advisory patch
Windows Kernel Remote Code Execution Vulnerability
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45657

Scores

CVSS v3 9.8
EPSS 0.0058
EPSS Percentile 42.8%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact total

Details

CWE
CWE-122 CWE-416
Status published
Products (13)
Microsoft/Windows 11 version 23H2 10.0.22631.0 - 10.0.22631.7219
Microsoft/Windows 11 Version 24H2 10.0.26100.0 - 10.0.26100.8655
Microsoft/Windows 11 Version 25H2 10.0.26200.0 - 10.0.26200.8655
Microsoft/Windows 11 version 26H1 10.0.28000.0 - 10.0.28000.2269
Microsoft/Windows Server 2022 10.0.20348.0 - 10.0.20348.5256
Microsoft/Windows Server 2025 10.0.26100.0 - 10.0.26100.32995
Microsoft/Windows Server 2025 (Server Core installation) 10.0.26100.0 - 10.0.26100.32995
microsoft/windows_11_23h2 < 10.0.22631.7219 (2 CPE variants)
microsoft/windows_11_24h2 < 10.0.26100.8655 (2 CPE variants)
microsoft/windows_11_25h2 < 10.0.26200.8655 (2 CPE variants)
... and 3 more
Published Jun 09, 2026
Tracked Since Jun 09, 2026