Description
Improper certificate validation in Active Directory Federation Services (AD FS) allows an unauthorized attacker to perform spoofing over a network.
Published: 2026-10-13
Score: 7.4 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Remediation

No vendor fix or workaround currently provided.

Additional remediation guidance may be available on OpenCVE Cloud.

Tracking

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-vrv5-2jg9-4mmr Microsoft Security Advisory CVE-2026-96222 - .NET Spoofing Vulnerability
History

Fri, 16 Oct 2026 00:30:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

 threat_severity

Important

Wed, 14 Oct 2026 05:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Tue, 13 Oct 2026 19:15:00 +0000

Type Values Removed Values Added
Description Improper certificate validation in Active Directory Federation Services (AD FS) allows an unauthorized attacker to perform spoofing over a network.
Title Active Directory Federation Services (AD FS) Spoofing Vulnerability
First Time appeared Microsoft
Microsoft .net
Microsoft .net Framework
Microsoft microsoft Visual Studio 2026 Version 18.10
Microsoft system.security.cryptography.xml
Microsoft visual Studio 2022
Microsoft windows 10 1607
Microsoft windows 10 1809
Microsoft windows Server 2012 R2
Microsoft windows Server 2016
Microsoft windows Server 2019
Microsoft windows Server 2022
Microsoft windows Server 2025
Weaknesses CWE-295
CPEs cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:.net_framework:*:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:microsoft_visual_studio_2026_version_18.10:*:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:system.security.cryptography.xml:*:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:visual_studio_2022:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x86:*
cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:*
cpe:2.3:o:microsoft:windows_server_2012_R2:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*
Vendors & Products Microsoft
Microsoft .net
Microsoft .net Framework
Microsoft microsoft Visual Studio 2026 Version 18.10
Microsoft system.security.cryptography.xml
Microsoft visual Studio 2022
Microsoft windows 10 1607
Microsoft windows 10 1809
Microsoft windows Server 2012 R2
Microsoft windows Server 2016
Microsoft windows Server 2019
Microsoft windows Server 2022
Microsoft windows Server 2025
References
Metrics cvssV3_1

{'score': 7.4, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C'}

Subscriptions

Microsoft .net .net Framework Microsoft Visual Studio 2026 Version 18.10 System.security.cryptography.xml Visual Studio 2022 Windows 10 1607 Windows 10 1809 Windows Server 2012 R2 Windows Server 2016 Windows Server 2019 Windows Server 2022 Windows Server 2025
cve-icon MITRE

Status: PUBLISHED

Assigner: microsoft

Published:

Updated: 2026-10-16T23:20:29.800Z

Reserved: 2026-09-22T18:57:22.166Z

Link: CVE-2026-96222

cve-icon Vulnrichment

Updated: 2026-10-13T22:19:09.570Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-10-13T19:21:48.030

Modified: 2026-10-14T04:18:57.730

Link: CVE-2026-96222

cve-icon Redhat

Severity : Important

Publid Date: 2026-10-13T17:00:00Z

Links: CVE-2026-96222 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-10-14T21:15:07Z

Weaknesses
  • CWE-295

    Improper Certificate Validation