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TI-2023-08074 Aliases CVE-2023-21687GHSA-mr4r-vfmp-v9q3

HTTP.sys Information Disclosure Vulnerability

Priority LOW 25CWE-125Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Information disclosure
Confidentiality · integrity · availability
High · None · None
Fix status
Fixed

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

Summary

HTTP.sys Information Disclosure Vulnerability

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00465 40th percentileScored 2026-11-07
Fix Fixed Microsoft: 4 updates

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
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 11 version 21H210.0.0 to before 10.0.22621.157410.0.22621.1574Patch availableCNA
MicrosoftWindows 11 version 22H210.0.22621.0 to before 10.0.22621.126510.0.22621.1265Patch availableCNA
MicrosoftWindows Server 202210.0.20348.0 to before 10.0.20348.154710.0.20348.1547Patch availableCNA
  • 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 11 version 22H2 VendorMicrosoft Affected 10.0.22621.0 to before 10.0.22621.1265 Fixed in 10.0.22621.1265 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 · 5

CPEVersionsRoleVendor
cpe:2.3:o:microsoft:windows_11_21h2:*:*:*:*:*:*:arm64:*before 10.0.22000.1574VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_11_21h2:*:*:*:*:*:*:x64:*before 10.0.22000.1574VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_11_22h2:*:*:*:*:*:*:arm64:*before 10.0.22621.1265VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_11_22h2:*:*:*:*:*:*:x64:*before 10.0.22621.1265VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_server_2022:-:*:*:*:*:*:*:*not specified by NVDVulnerableMicrosoft
  • cpe:2.3:o:microsoft:windows_11_21h2:*:*:*:*:*:*:arm64:* Versions before 10.0.22000.1574 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_11_21h2:*:*:*:*:*:*:x64:* Versions before 10.0.22000.1574 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_11_22h2:*:*:*:*:*:*:arm64:* Versions before 10.0.22621.1265 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_11_22h2:*:*:*:*:*:*:x64:* Versions before 10.0.22621.1265 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_server_2022:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Microsoft

Remediation

Microsoft 4 updates

  • KB5022921
    Security Hotpatch Update
    • Windows Server 2022 10.0.20348.1540
    • Windows Server 2022 (Server Core installation) 10.0.20348.1540
  • KB5022845
    Security Update
    • Windows 11 Version 22H2 for ARM64-based Systems 10.0.22621.1265
    • Windows 11 Version 22H2 for x64-based Systems 10.0.22621.1265
  • KB5022842
    Security Update
    • Windows Server 2022 10.0.20348.1547
    • Windows Server 2022 (Server Core installation) 10.0.20348.1547
Show 1 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

Vendor assessments

Microsoft

Microsoft's page for this CVE →

Impact
Information Disclosure
Exploited
No
Publicly disclosed
No
Exploitability
Exploitation Less Likely

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-21687
  2. 2026-10-03 Alias added: GHSA-mr4r-vfmp-v9q3

References

Patch 1

  • TI-2024-29106 Windows MSHTML Platform Spoofing Vulnerability KEVCVSS 3.1HIGH 8.8
  • TI-2024-19802 Windows MSHTML Platform Security Feature Bypass Vulnerability KEVCVSS 3.1HIGH 8.8
  • TI-2024-19751 SmartScreen Prompt Security Feature Bypass Vulnerability KEVCVSS 3.1HIGH 8.8
  • TI-2023-18080 Windows SmartScreen Security Feature Bypass Vulnerability KEVCVSS 3.1HIGH 8.8
  • TI-2023-15353 Windows SmartScreen Security Feature Bypass Vulnerability KEVCVSS 3.1HIGH 8.8
  • TI-2023-08061 Windows Advanced Local Procedure Call (ALPC) Elevation of Privilege Vulnerability KEVCVSS 3.1HIGH 8.8
See all 1000 →

Sources

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