Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability
Priority HIGH 72CWE-822Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Privilege escalation
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Microsoft. Impact type from Microsoft.
Summary
Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.65417 99th percentileScored 2026-11-07
Fix Fixed Microsoft: 3 updates
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Microsoft | Windows Server 2022 | 10.0.20348.0 to before 10.0.20348.1487 | 10.0.20348.1487 | Patch available | CNA |
| Microsoft | Windows 11 version 21H2 | 10.0.0 to before 10.0.22000.1455 | 10.0.22000.1455 | Patch available | CNA |
| Microsoft | Windows 11 version 22H2 | 10.0.22621.0 to before 10.0.22621.1105 | 10.0.22621.1105 | Patch available | CNA |
- Windows Server 2022 VendorMicrosoft Affected 10.0.20348.0 to before 10.0.20348.1487 Fixed in 10.0.20348.1487 Patch available CNA
- Windows 11 version 21H2 VendorMicrosoft Affected 10.0.0 to before 10.0.22000.1455 Fixed in 10.0.22000.1455 Patch available CNA
- Windows 11 version 22H2 VendorMicrosoft Affected 10.0.22621.0 to before 10.0.22621.1105 Fixed in 10.0.22621.1105 Patch available CNA
CPE configurations NVD · 5
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:microsoft:windows_11:21h2:*:*:*:*:*:arm64:* | 21h2 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_11:21h2:*:*:*:*:*:x64:* | 21h2 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_11:22h2:*:*:*:*:*:arm64:* | 22h2 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_11:22h2:*:*:*:*:*:x64:* | 22h2 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_server_2022:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Microsoft |
- cpe:2.3:o:microsoft:windows_11:21h2:*:*:*:*:*:arm64:* Versions 21h2 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_11:21h2:*:*:*:*:*:x64:* Versions 21h2 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_11:22h2:*:*:*:*:*:arm64:* Versions 22h2 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_11:22h2:*:*:*:*:*:x64:* Versions 22h2 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_server_2022:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Microsoft
Remediation
Microsoft 3 updates
- Security Update
- Windows 11 Version 22H2 for ARM64-based Systems 10.0.22621.1105
- Windows 11 Version 22H2 for x64-based Systems 10.0.22621.1105
- Security Update
- Windows Server 2022 10.0.20348.1487
- Windows Server 2022 (Server Core installation) 10.0.20348.1487
- Security Update
- Windows 11 version 21H2 for ARM64-based Systems 10.0.22000.1455
- Windows 11 version 21H2 for x64-based Systems 10.0.22000.1455
Vendor assessments
Microsoft
Microsoft's page for this CVE →
- Impact
- Elevation of Privilege
- Exploited
- No
- Publicly disclosed
- —
- Exploitability
- Exploitation More Likely
Timeline
- 2026-10-02 Threatist record created from CVE-2023-21768
- 2026-10-03 Alias added: GHSA-j69v-7pj3-vg67
References
More Microsoft Windows 11 vulnerabilities
- TI-2021-17499 Win32k Elevation of Privilege Vulnerability KEVCVSS 3.1HIGH 7.8
- TI-2022-10056 Remote Procedure Call Runtime Remote Code Execution Vulnerability CVSS 3.1CRITICAL 9.8
- TI-2022-06273 HTTP Protocol Stack Remote Code Execution Vulnerability CVSS 3.1CRITICAL 9.8
- TI-2022-15533 Windows Internet Key Exchange (IKE) Protocol Extensions Remote Code Execution Vulnerability CVSS 3.1CRITICAL 9.8
- TI-2023-08140 Windows Internet Key Exchange (IKE) Extension Denial of Service Vulnerability CVSS 3.1HIGH 7.5
- TI-2022-12476 Windows Server Service Tampering Vulnerability CVSS 3.1HIGH 8.8
Sources
- CVE-2023-21768 · CVE Program
- CVE-2023-21768 · NVD
- FIRST EPSS
- GHSA-j69v-7pj3-vg67 · GitHub Advisory Database · CC BY 4.0
- CVE-2023-21768 · Microsoft Security Update Guide
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences