CVE-2026-69366
Windows Kernel Elevation of Privilege Vulnerability
CVE-2026-69366 is fixed in 30 products on 1 platform, first by KB5123099, released September 8, 2026. It is not reported as exploited, but the vendor rates exploitation more likely. Patch Radar priority: Urgent.
Urgent
CVSS
7.1
Important
Exploitation
More likely
Vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0057
47th percentile
<p>Use after free in Windows Kernel allows an authorized attacker to elevate privileges over a network.</p>
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Microsoft | |||
| Windows 10 Version 1607 for 32-bit Systems | 14393.9512 | KB5123099 | Sep 8, 2026 |
| Windows 10 Version 1607 for x64-based Systems | 14393.9512 | KB5123099 | Sep 8, 2026 |
| Windows 10 Version 1809 for 32-bit Systems | 17763.9245 | KB5122876 | Sep 8, 2026 |
| Windows 10 Version 1809 for x64-based Systems | 17763.9245 | KB5122876 | Sep 8, 2026 |
| Windows 10 Version 21H2 for 32-bit Systems | KB5122878 | Sep 8, 2026 | |
| Windows 10 Version 21H2 for ARM64-based Systems | KB5122878 | Sep 8, 2026 | |
| Windows 10 Version 21H2 for x64-based Systems | KB5122878 | Sep 8, 2026 | |
| Windows 10 Version 22H2 for 32-bit Systems | KB5122878 | Sep 8, 2026 | |
| Windows 10 Version 22H2 for ARM64-based Systems | KB5122878 | Sep 8, 2026 | |
| Windows 10 Version 22H2 for x64-based Systems | KB5122878 | Sep 8, 2026 | |
| Windows 11 Version 23H2 for ARM64-based Systems | 22631.7582 | KB5122880 | Sep 8, 2026 |
| Windows 11 Version 23H2 for x64-based Systems | 22631.7582 | KB5122880 | Sep 8, 2026 |
| Windows 11 Version 24H2 for ARM64-based Systems | KB5124008 | Sep 8, 2026 | |
| Windows 11 Version 24H2 for x64-based Systems | KB5124008 | Sep 8, 2026 | |
| Windows 11 Version 25H2 for ARM64-based Systems | KB5124008 | Sep 8, 2026 | |
| Windows 11 Version 25H2 for x64-based Systems | KB5124008 | Sep 8, 2026 | |
| Windows 11 Version 26H1 for ARM64-based Systems | 28000.2954 | KB5124012 | Sep 8, 2026 |
| Windows 11 version 26H1 for x64-based Systems | 28000.2954 | KB5124012 | Sep 8, 2026 |
| Windows Server 2012 | KB5123065 | Sep 8, 2026 | |
| Windows Server 2012 (Server Core installation) | KB5123065 | Sep 8, 2026 | |
| Windows Server 2012 R2 | KB5123066 | Sep 8, 2026 | |
| Windows Server 2012 R2 (Server Core installation) | KB5123066 | Sep 8, 2026 | |
| Windows Server 2016 | 14393.9512 | KB5123099 | Sep 8, 2026 |
| Windows Server 2016 (Server Core installation) | 14393.9512 | KB5123099 | Sep 8, 2026 |
| Windows Server 2019 | 17763.9245 | KB5122876 | Sep 8, 2026 |
| Windows Server 2019 (Server Core installation) | 17763.9245 | KB5122876 | Sep 8, 2026 |
| Windows Server 2022 | 20348.5622 | KB5122882 | Sep 8, 2026 |
| Windows Server 2022 (Server Core installation) | 20348.5622 | KB5122882 | Sep 8, 2026 |
| Windows Server 2025 | 26100.33438 | KB5122871 | Sep 8, 2026 |
| Windows Server 2025 (Server Core installation) | 26100.33438 | KB5122871 | Sep 8, 2026 |
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