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TI-2025-15163 Aliases CVE-2025-21193GHSA-4wgp-9wjx-2m53

Active Directory Federation Server Spoofing Vulnerability

Priority LOW 30CWE-352Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Spoofing
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

Active Directory Federation Server Spoofing Vulnerability

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00741 54th percentileScored 2026-11-07
Fix Fixed Microsoft: 5 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 10.0.14393.769910.0.14393.7699Patch availableCNA
MicrosoftWindows Server 2016 (Server Core installation)10.0.14393.0 to before 10.0.14393.769910.0.14393.7699Patch availableCNA
MicrosoftWindows Server 201910.0.17763.0 to before 10.0.17763.677510.0.17763.6775Patch availableCNA
MicrosoftWindows Server 2019 (Server Core installation)10.0.17763.0 to before 10.0.17763.677510.0.17763.6775Patch availableCNA
MicrosoftWindows Server 202210.0.20348.0 to before 10.0.20348.309110.0.20348.3091Patch availableCNA
MicrosoftWindows Server 2022, 23H2 Edition (Server Core installation)10.0.25398.0 to before 10.0.25398.136910.0.25398.1369Patch availableCNA
MicrosoftWindows Server 202510.0.26100.0 to before 10.0.26100.289410.0.26100.2894Patch availableCNA
MicrosoftWindows Server 2025 (Server Core installation)10.0.26100.0 to before 10.0.26100.289410.0.26100.2894Patch availableCNA
  • Windows Server 2016 VendorMicrosoft Affected 10.0.14393.0 to before 10.0.14393.7699 Fixed in 10.0.14393.7699 Patch available CNA
  • Windows Server 2016 (Server Core installation) VendorMicrosoft Affected 10.0.14393.0 to before 10.0.14393.7699 Fixed in 10.0.14393.7699 Patch available CNA
  • Windows Server 2019 VendorMicrosoft Affected 10.0.17763.0 to before 10.0.17763.6775 Fixed in 10.0.17763.6775 Patch available CNA
  • Windows Server 2019 (Server Core installation) VendorMicrosoft Affected 10.0.17763.0 to before 10.0.17763.6775 Fixed in 10.0.17763.6775 Patch available CNA
  • Windows Server 2022 VendorMicrosoft Affected 10.0.20348.0 to before 10.0.20348.3091 Fixed in 10.0.20348.3091 Patch available CNA
  • Windows Server 2022, 23H2 Edition (Server Core installation) VendorMicrosoft Affected 10.0.25398.0 to before 10.0.25398.1369 Fixed in 10.0.25398.1369 Patch available CNA
  • Windows Server 2025 VendorMicrosoft Affected 10.0.26100.0 to before 10.0.26100.2894 Fixed in 10.0.26100.2894 Patch available CNA
  • Windows Server 2025 (Server Core installation) VendorMicrosoft Affected 10.0.26100.0 to before 10.0.26100.2894 Fixed in 10.0.26100.2894 Patch available CNA

CPE configurations NVD · 5

CPEVersionsRoleVendor
cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*before 10.0.14393.7699VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*before 10.0.17763.6775VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*before 10.0.20348.3091VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_server_2022_23h2:*:*:*:*:*:*:*:*before 10.0.25398.1369VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:x64:*before 10.0.26100.2894VulnerableMicrosoft
  • cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:* Versions before 10.0.14393.7699 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:* Versions before 10.0.17763.6775 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:* Versions before 10.0.20348.3091 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_server_2022_23h2:*:*:*:*:*:*:*:* Versions before 10.0.25398.1369 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:x64:* Versions before 10.0.26100.2894 Vulnerable ·Microsoft

Remediation

Microsoft 5 updates

  • KB5050009
    Security Update
    • Windows 11 Version 24H2 for ARM64-based Systems 10.0.26100.2894
    • Windows 11 Version 24H2 for x64-based Systems 10.0.26100.2894
    • Windows Server 2025 10.0.26100.2894
    • Windows Server 2025 (Server Core installation) 10.0.26100.2894
  • KB5050008
    Security Update
    • Windows 10 Version 1809 for 32-bit Systems 10.0.17763.6775
    • Windows 10 Version 1809 for x64-based Systems 10.0.17763.6775
    • Windows Server 2019 10.0.17763.6775
    • Windows Server 2019 (Server Core installation) 10.0.17763.6775
  • KB5049993
    Security Update
    • Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 10.0.14393.7699
    • Microsoft .NET Framework 3.5 AND 4.7.2 10.0.14393.7699
    • Windows 10 Version 1607 for 32-bit Systems 10.0.14393.7699
    • Windows 10 Version 1607 for x64-based Systems 10.0.14393.7699
    • Windows Server 2016 10.0.14393.7699
    • Windows Server 2016 (Server Core installation) 10.0.14393.7699
Show 2 more Microsoft updates
  • KB5049984
    Security Update
    • Windows Server 2022, 23H2 Edition (Server Core installation) 10.0.25398.1369
  • KB5049983
    Security Update
    • Windows Server 2022 10.0.20348.3091
    • Windows Server 2022 (Server Core installation) 10.0.20348.3091

Vendor assessments

Microsoft

Microsoft's page for this CVE →

Impact
Spoofing
Exploited
No
Publicly disclosed
No
Exploitability
Exploitation Less Likely

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-21193
  2. 2026-10-03 Alias added: GHSA-4wgp-9wjx-2m53

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