CVE-2026-45657: critical vulnerability in Microsoft Windows 11 version 23H2
Windows Kernel Remote Code Execution Vulnerability
Published · Updated
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
33Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 9.8epss 15%
Use after free in Windows Kernel allows an unauthorized attacker to execute code over a network.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Affected products
Microsoft · Windows 11 version 23H2Microsoft · Windows 11 Version 24H2Microsoft · Windows 11 Version 25H2Microsoft · Windows 11 version 26H1Microsoft · Windows Server 2022Microsoft · Windows Server 2025Microsoft · Windows Server 2025 (Server Core installation)Related CVEs — Microsoft Windows 11 version 23H2
In the same product, most dangerous first.
CVE-2025-33053HIGHInternet Shortcut Files Remote Code Execution VulnerabilityEPSS 87.1%KEVCVE-2024-43451MEDIUMNTLM Hash Disclosure Spoofing VulnerabilityEPSS 84.3%KEVCVE-2025-33073HIGHWindows SMB Client Elevation of Privilege VulnerabilityEPSS 82.8%KEVCVE-2026-33824CRITICALWindows Internet Key Exchange (IKE) Service Extensions Remote Code Execution VulnerabilityEPSS 77.1%KEVCVE-2026-32202MEDIUMWindows Shell Spoofing VulnerabilityEPSS 70.9%KEVCVE-2024-30088HIGHWindows Kernel Elevation of Privilege VulnerabilityEPSS 68.2%KEV