Vulnerability Intelligence Report
Windows Kernel Remote Code Execution Vulnerability
CVE-2026-45657
Use after free in Windows Kernel allows an unauthorized attacker to execute code over a network.
No Active Exploit Signals
CVSS Base Score
9.8
CRITICAL
Exploitability:3.9
Impact Score:5.9
EPSS Probability:0.97%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
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Authentication
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Weaponization
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SSVC Action
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Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| Microsoft | Windows 11 version 23H2 | 10.0.22631.0 < 10.0.22631.7219 (affected) |
| Microsoft | Windows 11 Version 23H2 | 10.0.22631.0 < 10.0.22631.7219 (affected) |
| Microsoft | Windows 11 Version 24H2 | 10.0.26100.0 < 10.0.26100.8655 (affected) |
| Microsoft | Windows 11 Version 25H2 | 10.0.26200.0 < 10.0.26200.8655 (affected) |
| Microsoft | Windows 11 version 26H1 | 10.0.28000.0 < 10.0.28000.2269 (affected) |
| Microsoft | Windows Server 2022 | 10.0.20348.0 < 10.0.20348.5256 (affected) |
| Microsoft | Windows Server 2025 | 10.0.26100.0 < 10.0.26100.32995 (affected) |
| Microsoft | Windows Server 2025 (Server Core installation) | 10.0.26100.0 < 10.0.26100.32995 (affected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
EPSS Score
0.974%
GitHub Advisory
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | Microsoft Corporation · Vendor · USA |
| Reserved | 2026-05-12T20:33:35 |
| Published | 2026-06-09T17:04:56 |
| Patch Date | 2026-06-09 |
| Last Updated | 2026-09-24T13:43:57 |
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