Vulnerability · Published Mar 10, 2026 · Assigned by microsoft
CVE-2026-24293Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability
High 7.8
In plain English
A high-severity null pointer dereference in Windows 10 Version 21H2 from Microsoft. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 48% of all known vulnerabilities).
Severity (CVSS 3.1)7.8High
Exploit odds (30 days)0.6%top 52.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Null pointer dereference in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Windows 10 Version 21H2 | 10.0.19044.0 – before 10.0.19044.7058 |
| Microsoft | Windows 10 Version 22H2 | 10.0.19045.0 – before 10.0.19045.7058 |
| Microsoft | Windows 11 version 23H2 | 10.0.22631.0 – before 10.0.22631.6783 |
| Microsoft | Windows 11 Version 23H2 | 10.0.22631.0 – before 10.0.22631.6783 |
| Microsoft | Windows 11 Version 24H2 | 10.0.26100.0 – before 10.0.26100.8037 |
| Microsoft | Windows 11 Version 25H2 | 10.0.26200.0 – before 10.0.26200.8037 |
| Microsoft | Windows 11 version 26H1 | 10.0.28000.0 – before 10.0.28000.1719 |
| Microsoft | Windows Server 2022 | 10.0.20348.0 – before 10.0.20348.4893 |
| Microsoft | Windows Server 2022, 23H2 Edition (Server Core installation) | 10.0.25398.0 – before 10.0.25398.2207 |
| Microsoft | Windows Server 2025 | 10.0.26100.0 – before 10.0.26100.32522 |
| Microsoft | Windows Server 2025 (Server Core installation) | 10.0.26100.0 – before 10.0.26100.32522 |
Weakness: CWE-476 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
References
- Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability vendor-advisory, patch