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TI-2026-19578 Aliases CVE-2026-24293GHSA-p66w-qxrc-77m9

Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability

Priority LOW 37CWE-476Published · 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

Null pointer dereference in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00573 47th percentileScored 2026-11-07
Fix Fixed Microsoft: 10 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

VendorProductAffected versionsFixed inStatusSource
MicrosoftWindows 10 Version 21H210.0.19044.0 to before 10.0.19044.705810.0.19044.7058Patch availableCNA
MicrosoftWindows 10 Version 22H210.0.19045.0 to before 10.0.19045.705810.0.19045.7058Patch availableCNA
MicrosoftWindows 11 version 23H210.0.22631.0 to before 10.0.22631.678310.0.22631.6783Patch availableCNA
MicrosoftWindows 11 Version 23H210.0.22631.0 to before 10.0.22631.678310.0.22631.6783Patch availableCNA
MicrosoftWindows 11 Version 24H210.0.26100.0 to before 10.0.26100.803710.0.26100.8037Patch availableCNA
MicrosoftWindows 11 Version 25H210.0.26200.0 to before 10.0.26200.803710.0.26200.8037Patch availableCNA
MicrosoftWindows 11 version 26H110.0.28000.0 to before 10.0.28000.171910.0.28000.1719Patch availableCNA
MicrosoftWindows Server 202210.0.20348.0 to before 10.0.20348.489310.0.20348.4893Patch availableCNA
MicrosoftWindows Server 2022, 23H2 Edition (Server Core installation)10.0.25398.0 to before 10.0.25398.220710.0.25398.2207Patch availableCNA
MicrosoftWindows Server 202510.0.26100.0 to before 10.0.26100.3252210.0.26100.32522Patch availableCNA
MicrosoftWindows Server 2025 (Server Core installation)10.0.26100.0 to before 10.0.26100.3252210.0.26100.32522Patch availableCNA
  • Windows 10 Version 21H2 VendorMicrosoft Affected 10.0.19044.0 to before 10.0.19044.7058 Fixed in 10.0.19044.7058 Patch available CNA
  • Windows 10 Version 22H2 VendorMicrosoft Affected 10.0.19045.0 to before 10.0.19045.7058 Fixed in 10.0.19045.7058 Patch available CNA
  • Windows 11 version 23H2 VendorMicrosoft Affected 10.0.22631.0 to before 10.0.22631.6783 Fixed in 10.0.22631.6783 Patch available CNA
  • Windows 11 Version 23H2 VendorMicrosoft Affected 10.0.22631.0 to before 10.0.22631.6783 Fixed in 10.0.22631.6783 Patch available CNA
  • Windows 11 Version 24H2 VendorMicrosoft Affected 10.0.26100.0 to before 10.0.26100.8037 Fixed in 10.0.26100.8037 Patch available CNA
  • Windows 11 Version 25H2 VendorMicrosoft Affected 10.0.26200.0 to before 10.0.26200.8037 Fixed in 10.0.26200.8037 Patch available CNA
  • Windows 11 version 26H1 VendorMicrosoft Affected 10.0.28000.0 to before 10.0.28000.1719 Fixed in 10.0.28000.1719 Patch available CNA
  • Windows Server 2022 VendorMicrosoft Affected 10.0.20348.0 to before 10.0.20348.4893 Fixed in 10.0.20348.4893 Patch available CNA
  • Windows Server 2022, 23H2 Edition (Server Core installation) VendorMicrosoft Affected 10.0.25398.0 to before 10.0.25398.2207 Fixed in 10.0.25398.2207 Patch available CNA
  • Windows Server 2025 VendorMicrosoft Affected 10.0.26100.0 to before 10.0.26100.32522 Fixed in 10.0.26100.32522 Patch available CNA
  • Windows Server 2025 (Server Core installation) VendorMicrosoft Affected 10.0.26100.0 to before 10.0.26100.32522 Fixed in 10.0.26100.32522 Patch available CNA

CPE configurations NVD · 17

CPEVersionsRoleVendor
cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:arm64:*before 10.0.19044.7058VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:x64:*before 10.0.19044.7058VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:x86:*before 10.0.19044.7058VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:arm64:*before 10.0.19045.7058VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:x64:*before 10.0.19045.7058VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:x86:*before 10.0.19045.7058VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:arm64:*before 10.0.22631.6783VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:x64:*before 10.0.22631.6783VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:arm64:*before 10.0.26100.7979VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:x64:*before 10.0.26100.7979VulnerableMicrosoft
  • cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:arm64:* Versions before 10.0.19044.7058 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:x64:* Versions before 10.0.19044.7058 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:x86:* Versions before 10.0.19044.7058 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:arm64:* Versions before 10.0.19045.7058 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:x64:* Versions before 10.0.19045.7058 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:x86:* Versions before 10.0.19045.7058 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:arm64:* Versions before 10.0.22631.6783 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:x64:* Versions before 10.0.22631.6783 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:arm64:* Versions before 10.0.26100.7979 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:x64:* Versions before 10.0.26100.7979 Vulnerable ·Microsoft
Show 7 more CPE
CPEVersionsRoleVendor
cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:arm64:*before 10.0.26200.7979VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:x64:*before 10.0.26200.7979VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_11_26h1:*:*:*:*:*:*:arm64:*before 10.0.28000.1719VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_11_26h1:*:*:*:*:*:*:x64:*before 10.0.28000.1719VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*before 10.0.20348.4830VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_server_2022_23h2:*:*:*:*:*:*:*:*before 10.0.25398.2207VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:x64:*before 10.0.26100.32463VulnerableMicrosoft
  • cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:arm64:* Versions before 10.0.26200.7979 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:x64:* Versions before 10.0.26200.7979 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_11_26h1:*:*:*:*:*:*:arm64:* Versions before 10.0.28000.1719 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_11_26h1:*:*:*:*:*:*:x64:* Versions before 10.0.28000.1719 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:* Versions before 10.0.20348.4830 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_server_2022_23h2:*:*:*:*:*:*:*:* Versions before 10.0.25398.2207 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:x64:* Versions before 10.0.26100.32463 Vulnerable ·Microsoft

Remediation

Microsoft 10 updates

  • KB5079473
    Security Update
    • Windows 11 Version 24H2 for ARM64-based Systems 10.0.26100.8037
    • Windows 11 Version 24H2 for x64-based Systems 10.0.26100.8037
    • Windows 11 Version 25H2 for ARM64-based Systems 10.0.26200.8037
    • Windows 11 Version 25H2 for x64-based Systems 10.0.26200.8037
  • KB5079466
    Security Update
    • Windows 11 Version 26H1 for ARM64-based Systems 10.0.28000.1719
    • Windows 11 version 26H1 for x64-based Systems 10.0.28000.1719
  • KB5079420
    Security Hotpatch Update
    • Windows 11 Version 24H2 for ARM64-based Systems 10.0.26100.7979
    • Windows 11 Version 24H2 for x64-based Systems 10.0.26100.7979
    • Windows 11 Version 25H2 for ARM64-based Systems 10.0.26200.7979
    • Windows 11 Version 25H2 for x64-based Systems 10.0.26200.7979
Show 7 more Microsoft updates
  • KB5078885
    Security Update
    • Windows 10 Version 21H2 for 32-bit Systems 10.0.19044.7058
    • Windows 10 Version 21H2 for ARM64-based Systems 10.0.19044.7058
    • Windows 10 Version 21H2 for x64-based Systems 10.0.19044.7058
    • Windows 10 Version 22H2 for 32-bit Systems 10.0.19045.7058
    • Windows 10 Version 22H2 for ARM64-based Systems 10.0.19045.7058
    • Windows 10 Version 22H2 for x64-based Systems 10.0.19045.7058
  • KB5078883
    Security Update
    • Windows 11 Version 23H2 for ARM64-based Systems 10.0.22631.6783
    • Windows 11 Version 23H2 for x64-based Systems 10.0.22631.6783
  • KB5078766
    Security Update
    • Windows Server 2022 10.0.20348.4893
    • Windows Server 2022 (Server Core installation) 10.0.20348.4893
  • KB5078740
    Security Update
    • Windows Server 2025 10.0.26100.32522
    • Windows Server 2025 (Server Core installation) 10.0.26100.32522
  • KB5078737
    Security Hotpatch Update
    • Windows Server 2022 10.0.20348.4830
    • Windows Server 2022 (Server Core installation) 10.0.20348.4830
  • KB5078736
    Security Hotpatch Update
    • Windows Server 2025 10.0.26100.32463
    • Windows Server 2025 (Server Core installation) 10.0.26100.32463
  • KB5078734
    Security Update
    • Windows Server 2022, 23H2 Edition (Server Core installation) 10.0.25398.2207

Vendor assessments

Microsoft

Microsoft's page for this CVE →

Impact
Elevation of Privilege
Exploited
No
Publicly disclosed
No
Exploitability
Exploitation Less Likely

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-24293
  2. 2026-10-03 Alias added: GHSA-p66w-qxrc-77m9

References

Patch 1

  • TI-2026-26194 Windows Internet Key Exchange (IKE) Service Extensions Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-73128 Windows Shell Security Feature Bypass Vulnerability KEVCVSS 3.1HIGH 8.8
  • TI-2026-17367 MSHTML Framework Security Feature Bypass Vulnerability KEVCVSS 3.1HIGH 8.8
  • TI-2026-17364 Windows Shell Security Feature Bypass Vulnerability KEVCVSS 3.1HIGH 8.8
  • TI-2025-24062 Windows SMB Client Elevation of Privilege Vulnerability KEVCVSS 3.1HIGH 8.8
  • TI-2025-24042 Internet Shortcut Files Remote Code Execution Vulnerability KEVCVSS 3.1HIGH 8.8
See all 3967 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences