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TI-2023-08198 Aliases CVE-2023-21819GHSA-f73c-qhrh-5x2f

Windows Secure Channel Denial of Service Vulnerability

Priority MEDIUM 63CWE-125Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Microsoft. Impact type from Microsoft.

Summary

Windows Secure Channel Denial of Service Vulnerability

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.30806 98th percentileScored 2026-11-07
Fix Fixed Microsoft: 5 updates

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

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 180910.0.17763.0 to before 10.0.17763.401010.0.17763.4010Patch availableCNA
MicrosoftWindows 10 Version 180910.0.0 to before 10.0.17763.401010.0.17763.4010Patch availableCNA
MicrosoftWindows 10 Version 20H210.0.0 to before 10.0.19042.260410.0.19042.2604Patch availableCNA
MicrosoftWindows 10 Version 21H210.0.19043.0 to before 10.0.19044.260410.0.19044.2604Patch availableCNA
MicrosoftWindows 10 Version 22H210.0.19045.0 to before 10.0.19045.260410.0.19045.2604Patch availableCNA
MicrosoftWindows 11 version 21H210.0.0 to before 10.0.22621.157410.0.22621.1574Patch availableCNA
MicrosoftWindows Server 201910.0.17763.0 to before 10.0.17763.401010.0.17763.4010Patch availableCNA
MicrosoftWindows Server 2019 (Server Core installation)10.0.17763.0 to before 10.0.17763.401010.0.17763.4010Patch availableCNA
MicrosoftWindows Server 202210.0.20348.0 to before 10.0.20348.154710.0.20348.1547Patch availableCNA
  • Windows 10 Version 1809 VendorMicrosoft Affected 10.0.17763.0 to before 10.0.17763.4010 Fixed in 10.0.17763.4010 Patch available CNA
  • Windows 10 Version 1809 VendorMicrosoft Affected 10.0.0 to before 10.0.17763.4010 Fixed in 10.0.17763.4010 Patch available CNA
  • Windows 10 Version 20H2 VendorMicrosoft Affected 10.0.0 to before 10.0.19042.2604 Fixed in 10.0.19042.2604 Patch available CNA
  • Windows 10 Version 21H2 VendorMicrosoft Affected 10.0.19043.0 to before 10.0.19044.2604 Fixed in 10.0.19044.2604 Patch available CNA
  • Windows 10 Version 22H2 VendorMicrosoft Affected 10.0.19045.0 to before 10.0.19045.2604 Fixed in 10.0.19045.2604 Patch available CNA
  • Windows 11 version 21H2 VendorMicrosoft Affected 10.0.0 to before 10.0.22621.1574 Fixed in 10.0.22621.1574 Patch available CNA
  • Windows Server 2019 VendorMicrosoft Affected 10.0.17763.0 to before 10.0.17763.4010 Fixed in 10.0.17763.4010 Patch available CNA
  • Windows Server 2019 (Server Core installation) VendorMicrosoft Affected 10.0.17763.0 to before 10.0.17763.4010 Fixed in 10.0.17763.4010 Patch available CNA
  • Windows Server 2022 VendorMicrosoft Affected 10.0.20348.0 to before 10.0.20348.1547 Fixed in 10.0.20348.1547 Patch available CNA

CPE configurations NVD · 7

CPEVersionsRoleVendor
cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:*:*before 10.0.17763.4010VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_10_20h2:*:*:*:*:*:*:*:*before 10.0.19042.2604VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:*:*before 10.0.19044.2604VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:*:*before 10.0.19045.2604VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_11_21h2:*:*:*:*:*:*:*:*before 10.0.22000.1574VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_server_2019:-:*:*:*:*:*:*:*not specified by NVDVulnerableMicrosoft
cpe:2.3:o:microsoft:windows_server_2022:-:*:*:*:*:*:*:*not specified by NVDVulnerableMicrosoft
  • cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:*:* Versions before 10.0.17763.4010 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_10_20h2:*:*:*:*:*:*:*:* Versions before 10.0.19042.2604 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:*:* Versions before 10.0.19044.2604 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:*:* Versions before 10.0.19045.2604 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_11_21h2:*:*:*:*:*:*:*:* Versions before 10.0.22000.1574 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_server_2019:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_server_2022:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Microsoft

Remediation

Microsoft 5 updates

  • KB5022921
    Security Hotpatch Update
    • Windows Server 2022 10.0.20348.1540
    • Windows Server 2022 (Server Core installation) 10.0.20348.1540
  • KB5022842
    Security Update
    • Windows Server 2022 10.0.20348.1547
    • Windows Server 2022 (Server Core installation) 10.0.20348.1547
  • KB5022840
    Security Update
    • Windows 10 Version 1809 for 32-bit Systems 10.0.17763.4010
    • Windows 10 Version 1809 for ARM64-based Systems 10.0.17763.4010
    • Windows 10 Version 1809 for x64-based Systems 10.0.17763.4010
    • Windows Server 2019 10.0.17763.4010
    • Windows Server 2019 (Server Core installation) 10.0.17763.4010
Show 2 more Microsoft updates
  • KB5022836
    Security Update
    • Windows 11 version 21H2 for ARM64-based Systems 10.0.22621.1574
    • Windows 11 version 21H2 for x64-based Systems 10.0.22621.1574
  • KB5022834
    Security Update
    • Windows 10 Version 20H2 for 32-bit Systems 10.0.19042.2604
    • Windows 10 Version 20H2 for ARM64-based Systems 10.0.19042.2604
    • Windows 10 Version 21H2 for 32-bit Systems 10.0.19044.2604
    • Windows 10 Version 21H2 for ARM64-based Systems 10.0.19044.2604
    • Windows 10 Version 21H2 for x64-based Systems 10.0.19044.2604
    • Windows 10 Version 22H2 for 32-bit Systems 10.0.19045.2604
    • Windows 10 Version 22H2 for ARM64-based Systems 10.0.19045.2604
    • Windows 10 Version 22H2 for x64-based Systems 10.0.19045.2604

Vendor assessments

Microsoft

Microsoft's page for this CVE →

Impact
Denial of Service
Exploited
No
Publicly disclosed
No
Exploitability
Exploitation More Likely

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-21819
  2. 2026-10-03 Alias added: GHSA-f73c-qhrh-5x2f

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 4016 →

Sources

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