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7.8
CVE-2026-65773: Windows Kernel Privilege Elevation Risk on Windows Systems
CVE-2026-65773 · published 2 months ago
Summary
A vulnerability in Windows Kernel could allow an authorized user to gain higher-level access to a Windows system. This could potentially allow them to access sensitive data or perform actions they shouldn't be able to. Update your Windows systems to the latest version to protect against this vulnerability.
What to do
- Update microsoft windows 10 version 21h2 to version 10.0.19044.7663 or later.
- Update microsoft windows 10 version 22h2 to version 10.0.19045.7663 or later.
- Update microsoft windows 11 version 23h2 to version 10.0.22631.7517 or later.
- Update microsoft windows 11 version 24h2 to version 10.0.26100.9168 or later.
- Update microsoft windows 11 version 25h2 to version 10.0.26200.9168 or later.
- Update microsoft windows 11 version 26h1 to version 10.0.28000.2704 or later.
- Update microsoft windows server 2022 to version 10.0.20348.5499 or later.
- Update microsoft windows server 2025 to version 10.0.26100.33296 or later.
- Update microsoft windows server 2025 (server core installation) to version 10.0.26100.33296 or later.
- Update microsoft windows_10_1809 to version 10.0.17763.9115 or later.
- Update microsoft windows_10_21h2 to version 10.0.19044.7663 or later.
- Update microsoft windows_10_22h2 to version 10.0.19045.7663 or later.
- Update microsoft windows_11_23h2 to version 10.0.22631.7517 or later.
- Update microsoft windows_11_24h2 to version 10.0.26100.9106 or later.
- Update microsoft windows_11_25h2 to version 10.0.26200.9106 or later.
- Update microsoft windows_11_26h1 to version 10.0.28000.2704 or later.
- Update microsoft windows_server_2019 to version 10.0.17763.9115 or later.
- Update microsoft windows_server_2022 to version 10.0.20348.5440 or later.
- Update microsoft windows_server_2025 to version 10.0.26100.33222 or later.
Affected software
| Vendor | Product | Affected versions |
|---|---|---|
| microsoft | windows 10 version 1809 |
< 10.0.17763.9115 < 10.0.17763.9121 |
| microsoft | windows 10 version 21h2 | < 10.0.19044.7663 |
| microsoft | windows 10 version 22h2 | < 10.0.19045.7663 |
| microsoft | windows 11 version 23h2 | < 10.0.22631.7517 |
| microsoft | windows 11 version 24h2 | < 10.0.26100.9168 |
| microsoft | windows 11 version 25h2 | < 10.0.26200.9168 |
| microsoft | windows 11 version 26h1 | < 10.0.28000.2704 |
| microsoft | windows server 2019 |
< 10.0.17763.9115 < 10.0.17763.9121 |
| microsoft | windows server 2019 (server core installation) |
< 10.0.17763.9115 < 10.0.17763.9121 |
| microsoft | windows server 2022 | < 10.0.20348.5499 |
| microsoft | windows server 2025 | < 10.0.26100.33296 |
| microsoft | windows server 2025 (server core installation) | < 10.0.26100.33296 |
| microsoft | windows_10_1809 |
< 10.0.17763.9115 cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x64:* |
| microsoft | windows_10_21h2 |
< 10.0.19044.7663 cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:arm64:* |
| microsoft | windows_10_22h2 |
< 10.0.19045.7663 cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:arm64:* |
| microsoft | windows_11_23h2 |
< 10.0.22631.7517 cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:arm64:* |
| microsoft | windows_11_24h2 |
< 10.0.26100.9106 cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:arm64:* |
| microsoft | windows_11_25h2 |
< 10.0.26200.9106 cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:arm64:* |
| microsoft | windows_11_26h1 |
< 10.0.28000.2704 cpe:2.3:o:microsoft:windows_11_26h1:*:*:*:*:*:*:arm64:* |
| microsoft | windows_server_2019 |
< 10.0.17763.9115 cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:* |
| microsoft | windows_server_2022 |
< 10.0.20348.5440 cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:* |
| microsoft | windows_server_2025 |
< 10.0.26100.33222 cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:* |
Original advisory text
Windows Kernel Elevation of Privilege Vulnerability
Improper access control in Windows Kernel allows an authorized attacker to elevate privileges locally.
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-65773 vendor-advisory patch
Internet-facing
14 days
Internal
At next upgrade
- Not known to be exploited
- Needs hands-on effort to exploit
- Gives an attacker full control
Type
CWE-284Improper Access Control
Timeline
Published11 Aug 2026
Updated3 Nov 2026
First seen11 Aug 2026
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