Improper access control in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.
References
| Link | Resource |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21238 | Vendor Advisory |
Configurations
Configuration 1 (hide)
|
History
11 Feb 2026, 21:01
| Type | Values Removed | Values Added |
|---|---|---|
| CPE | cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:x64:* cpe:2.3:o:microsoft:windows_server_2022_23h2:*:*:*:*:*:*:*:* cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:arm64:* cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:* cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:x64:* cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:* cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:arm64:* cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:arm64:* cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x86:* cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:x86:* cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:* cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x64:* cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:arm64:* cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x64:* cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:x64:* cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:* cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:* cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:x64:* cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:* cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:x86:* cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:arm64:* cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:* cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:x64:* |
|
| References | () https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21238 - Vendor Advisory | |
| First Time |
Microsoft windows 10 22h2
Microsoft windows 10 21h2 Microsoft windows 10 1607 Microsoft windows 11 23h2 Microsoft windows 11 24h2 Microsoft windows Server 2019 Microsoft windows 10 1809 Microsoft windows Server 2022 23h2 Microsoft windows 11 25h2 Microsoft windows Server 2012 Microsoft windows Server 2025 Microsoft windows Server 2022 Microsoft windows Server 2016 Microsoft |
10 Feb 2026, 18:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-02-10 18:16
Updated : 2026-02-11 21:01
NVD link : CVE-2026-21238
Mitre link : CVE-2026-21238
CVE.ORG link : CVE-2026-21238
JSON object : View
Products Affected
microsoft
- windows_server_2019
- windows_server_2012
- windows_10_1809
- windows_11_24h2
- windows_11_25h2
- windows_11_23h2
- windows_server_2016
- windows_server_2022
- windows_server_2022_23h2
- windows_server_2025
- windows_10_22h2
- windows_10_21h2
- windows_10_1607
CWE
CWE-284
Improper Access Control