vulnerability
Microsoft Windows: CVE-2026-21241: Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 7 | (AV:L/AC:M/Au:S/C:C/I:C/A:C) | Feb 10, 2026 | Feb 10, 2026 | May 8, 2026 |
Severity
7
CVSS
(AV:L/AC:M/Au:S/C:C/I:C/A:C)
Published
Feb 10, 2026
Added
Feb 10, 2026
Modified
May 8, 2026
Description
Microsoft Windows: CVE-2026-21241: Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability
Solutions
microsoft-windows-windows_11-23h2-kb5075941microsoft-windows-windows_11-24h2-kb5077181microsoft-windows-windows_11-25h2-kb5077181microsoft-windows-windows_11-26h1-kb5077179microsoft-windows-windows_server_2022-21h2-kb5075906microsoft-windows-windows_server_2022-22h2-kb5075906microsoft-windows-windows_server_2022-23h2-kb5075897microsoft-windows-windows_server_2025-24h2-kb5075899
References
- CVE-2026-21241
- https://attackerkb.com/topics/CVE-2026-21241
- CWE-416
- EUVD-EUVD-2026-7319
- https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-7319
- https://support.microsoft.com/help/5075897
- https://support.microsoft.com/help/5075899
- https://support.microsoft.com/help/5075906
- https://support.microsoft.com/help/5075941
- https://support.microsoft.com/help/5077179
- https://support.microsoft.com/help/5077181
Rapid7 Labs
2026 Global Threat Landscape Report
The predictive window has collapsed. Exploitation follows disclosure in days. See how attackers are accelerating and how to stay ahead.