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TI-2026-16848 Aliases CVE-2026-20818GHSA-hxrp-mjg3-hpmr

Windows Kernel Information Disclosure Vulnerability

Priority LOW 29CWE-532Published · Updated

Key facts

Attack vector
Local
Privileges required
None
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

Insertion of sensitive information into log file in Windows Kernel allows an unauthorized attacker to disclose information locally.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00712 53rd 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 Server 201610.0.14393.0 to before 10.0.14393.878310.0.14393.8783Patch availableCNA
MicrosoftWindows Server 2016 (Server Core installation)10.0.14393.0 to before 10.0.14393.878310.0.14393.8783Patch availableCNA
MicrosoftWindows Server 201910.0.17763.0 to before 10.0.17763.827610.0.17763.8276Patch availableCNA
MicrosoftWindows Server 2019 (Server Core installation)10.0.17763.0 to before 10.0.17763.827610.0.17763.8276Patch availableCNA
MicrosoftWindows Server 202210.0.20348.0 to before 10.0.20348.464810.0.20348.4648Patch availableCNA
MicrosoftWindows Server 2022, 23H2 Edition (Server Core installation)10.0.25398.0 to before 10.0.25398.209210.0.25398.2092Patch availableCNA
MicrosoftWindows Server 202510.0.26100.0 to before 10.0.26100.3223010.0.26100.32230Patch availableCNA
MicrosoftWindows Server 2025 (Server Core installation)10.0.26100.0 to before 10.0.26100.3223010.0.26100.32230Patch availableCNA
  • Windows Server 2016 VendorMicrosoft Affected 10.0.14393.0 to before 10.0.14393.8783 Fixed in 10.0.14393.8783 Patch available CNA
  • Windows Server 2016 (Server Core installation) VendorMicrosoft Affected 10.0.14393.0 to before 10.0.14393.8783 Fixed in 10.0.14393.8783 Patch available CNA
  • Windows Server 2019 VendorMicrosoft Affected 10.0.17763.0 to before 10.0.17763.8276 Fixed in 10.0.17763.8276 Patch available CNA
  • Windows Server 2019 (Server Core installation) VendorMicrosoft Affected 10.0.17763.0 to before 10.0.17763.8276 Fixed in 10.0.17763.8276 Patch available CNA
  • Windows Server 2022 VendorMicrosoft Affected 10.0.20348.0 to before 10.0.20348.4648 Fixed in 10.0.20348.4648 Patch available CNA
  • Windows Server 2022, 23H2 Edition (Server Core installation) VendorMicrosoft Affected 10.0.25398.0 to before 10.0.25398.2092 Fixed in 10.0.25398.2092 Patch available CNA
  • Windows Server 2025 VendorMicrosoft Affected 10.0.26100.0 to before 10.0.26100.32230 Fixed in 10.0.26100.32230 Patch available CNA
  • Windows Server 2025 (Server Core installation) VendorMicrosoft Affected 10.0.26100.0 to before 10.0.26100.32230 Fixed in 10.0.26100.32230 Patch available CNA

CPE configurations NVD · 5

CPEVersionsRoleVendor
cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*before 10.0.14393.8783VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*before 10.0.17763.8276VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*before 10.0.20348.4648VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_server_2022_23h2:*:*:*:*:*:*:*:*before 10.0.25398.2092VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*before 10.0.26100.7623VulnerableMicrosoft
  • cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:* Versions before 10.0.14393.8783 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:* Versions before 10.0.17763.8276 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:* Versions before 10.0.20348.4648 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_server_2022_23h2:*:*:*:*:*:*:*:* Versions before 10.0.25398.2092 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:* Versions before 10.0.26100.7623 Vulnerable ·Microsoft

Remediation

Microsoft 4 updates

  • KB5073723
    Security Update
    • Windows 10 Version 1809 for 32-bit Systems 10.0.17763.8276
    • Windows 10 Version 1809 for x64-based Systems 10.0.17763.8276
    • Windows Server 2019 10.0.17763.8276
    • Windows Server 2019 (Server Core installation) 10.0.17763.8276
  • KB5073722
    Security Update
    • Windows 10 Version 1607 for 32-bit Systems 10.0.14393.8783
    • Windows 10 Version 1607 for x64-based Systems 10.0.14393.8783
    • Windows Server 2016 10.0.14393.8783
    • Windows Server 2016 (Server Core installation) 10.0.14393.8783
  • KB5073457
    Security Update
    • Windows Server 2022 10.0.20348.4648
    • Windows Server 2022 (Server Core installation) 10.0.20348.4648
Show 1 more Microsoft updates
  • KB5073450
    Security Update
    • Windows Server 2022, 23H2 Edition (Server Core installation) 10.0.25398.2092

Vendor assessments

Microsoft

Microsoft's page for this CVE →

Impact
Information Disclosure
Exploited
No
Publicly disclosed
No
Exploitability
Exploitation Unlikely
ProductStatusPlan or fix
Windows Server 2025Fixed 10.0.26100.32230 · Security Update
Windows Server 2025 (Server Core installation)Fixed 10.0.26100.32230 · Security Update

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-20818
  2. 2026-10-03 Alias added: GHSA-hxrp-mjg3-hpmr

References

Patch 1

  • TI-2026-26194 Windows Internet Key Exchange (IKE) Service Extensions Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 9.8
  • TI-2025-36863 Windows Server Update Service (WSUS) Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 9.8
  • TI-2020-01431 Netlogon Elevation of Privilege Vulnerability KEVCVSS 3.1CRITICAL 10.0
  • TI-2020-01310 Improper input validation in Microsoft Windows Server KEVCVSS 3.1CRITICAL 10.0
  • TI-2017-06077 Microsoft Windows XP SP3, Windows XP x64 XP2, Windows Server 2003 SP2, Windows Vista… KEVCVSS 3.1CRITICAL 9.8
  • TI-2020-01009 Improper input validation in Microsoft Windows Server KEVCVSS 3.1CRITICAL 9.0
See all 6400 →

Sources

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