FKIE_CVE-2026-96222
Vulnerability from fkie_nvd - Published: 2026-10-13 19:21 - Updated: 2026-10-14 04:18
Severity
Summary
Improper certificate validation in Active Directory Federation Services (AD FS) allows an unauthorized attacker to perform spoofing over a network.
References
Impacted products
| Vendor | Product | Version |
|---|
{
"affected": [
{
"affectedData": [
{
"platforms": [
"Windows 11 version 26H1",
"Windows Server 2012",
"Windows Server 2012 R2"
],
"product": "Microsoft .NET Framework 3.5",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "2.0.50727.9188 AND 3.0.30729.9171",
"status": "affected",
"version": "3.5.0",
"versionType": "custom"
}
]
},
{
"platforms": [
"Windows 10 version 1607",
"Windows Server 2016",
"Windows Server 2019"
],
"product": "Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "2.0.50727.8987 AND 3.0.30729.8982 AND 4.7.4150.0",
"status": "affected",
"version": "3.0.0.0",
"versionType": "custom"
}
]
},
{
"platforms": [
"Windows 10 version 1809"
],
"product": "Microsoft .NET Framework 3.5 AND 4.7.2",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "2.0.50727.9073 AND 3.0.30729.9070 AND 4.7.4150.0",
"status": "affected",
"version": "4.7.0",
"versionType": "custom"
}
]
},
{
"platforms": [
"Windows 10 version 1809",
"Windows 10 version 21H2",
"Windows 10 version 22H2",
"Windows Server 2019",
"Windows Server 2022"
],
"product": "Microsoft .NET Framework 3.5 AND 4.8",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "2.0.50727.9073 AND 3.0.30729.9070 AND 4.8.4811.0",
"status": "affected",
"version": "4.8.0",
"versionType": "custom"
}
]
},
{
"platforms": [
"Windows 10 version 21H2",
"Windows 10 version 22H2",
"Windows 11 version 23H2",
"Windows 11 version 24H2",
"Windows 11 version 25H2",
"Windows 11 version 26H2",
"Windows Server 2022",
"Windows Server 2025"
],
"product": "Microsoft .NET Framework 3.5 AND 4.8.1",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "2.0.50727.9188 AND 3.0.30729.9171 AND 4.8.9363.0",
"status": "affected",
"version": "4.8.1",
"versionType": "custom"
}
]
},
{
"platforms": [
"Windows Server 2012",
"Windows Server 2012 R2"
],
"product": "Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "4.7.4150.0",
"status": "affected",
"version": "4.7.0",
"versionType": "custom"
}
]
},
{
"platforms": [
"Windows 10 version 1607",
"Windows Server 2012",
"Windows Server 2012 R2",
"Windows Server 2016"
],
"product": "Microsoft .NET Framework 4.8",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "4.8.4811.0",
"status": "affected",
"version": "4.8.0",
"versionType": "custom"
}
]
},
{
"platforms": [
"Windows 11 version 26H1"
],
"product": "Microsoft .NET Framework 4.8.1",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "4.8.9363.0",
"status": "affected",
"version": "4.8.0.0",
"versionType": "custom"
}
]
},
{
"product": "Microsoft Visual Studio 2022 version 17.14",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "17.14.42",
"status": "affected",
"version": "17.14.0",
"versionType": "custom"
}
]
},
{
"product": "Microsoft Visual Studio 2026 version 18.10",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "18.10.4",
"status": "affected",
"version": "18.10.0",
"versionType": "custom"
}
]
},
{
"platforms": [
".NET 8.0 installed on Linux",
".NET 8.0 installed on Mac OS",
".NET 8.0 installed on Windows"
],
"product": "System.Security.Cryptography.Xml",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "8.0.5",
"status": "affected",
"version": "10.0.0",
"versionType": "custom"
}
]
},
{
"platforms": [
"32-bit Systems",
"x64-based Systems"
],
"product": "Windows 10 Version 1607",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "10.0.14393.9612",
"status": "affected",
"version": "10.0.14393.0",
"versionType": "custom"
}
]
},
{
"platforms": [
"32-bit Systems",
"x64-based Systems"
],
"product": "Windows 10 Version 1809",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "10.0.17763.9376",
"status": "affected",
"version": "10.0.17763.0",
"versionType": "custom"
}
]
},
{
"platforms": [
"x64-based Systems"
],
"product": "Windows Server 2012 R2",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "6.3.9600.23470",
"status": "affected",
"version": "6.3.9600.0",
"versionType": "custom"
}
]
},
{
"platforms": [
"x64-based Systems"
],
"product": "Windows Server 2012 R2 (Server Core installation)",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "6.3.9600.23470",
"status": "affected",
"version": "6.3.9600.0",
"versionType": "custom"
}
]
},
{
"platforms": [
"x64-based Systems"
],
"product": "Windows Server 2016",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "10.0.14393.9612",
"status": "affected",
"version": "10.0.14393.0",
"versionType": "custom"
}
]
},
{
"platforms": [
"x64-based Systems"
],
"product": "Windows Server 2016 (Server Core installation)",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "10.0.14393.9612",
"status": "affected",
"version": "10.0.14393.0",
"versionType": "custom"
}
]
},
{
"platforms": [
"x64-based Systems"
],
"product": "Windows Server 2019",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "10.0.17763.9376",
"status": "affected",
"version": "10.0.17763.0",
"versionType": "custom"
}
]
},
{
"platforms": [
"x64-based Systems"
],
"product": "Windows Server 2019 (Server Core installation)",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "10.0.17763.9376",
"status": "affected",
"version": "10.0.17763.0",
"versionType": "custom"
}
]
},
{
"platforms": [
"x64-based Systems"
],
"product": "Windows Server 2022",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "10.0.20348.5761",
"status": "affected",
"version": "10.0.20348.0",
"versionType": "custom"
}
]
},
{
"platforms": [
"x64-based Systems"
],
"product": "Windows Server 2025",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "10.0.26100.33650",
"status": "affected",
"version": "10.0.26100.0",
"versionType": "custom"
}
]
},
{
"platforms": [
"x64-based Systems"
],
"product": "Windows Server 2025 (Server Core installation)",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "10.0.26100.33650",
"status": "affected",
"version": "10.0.26100.0",
"versionType": "custom"
}
]
}
],
"source": "secure@microsoft.com"
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "Improper certificate validation in Active Directory Federation Services (AD FS) allows an unauthorized attacker to perform spoofing over a network."
}
],
"id": "CVE-2026-96222",
"lastModified": "2026-10-14T04:18:57.730",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 7.4,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
"version": "3.1"
},
"exploitabilityScore": 2.2,
"impactScore": 5.2,
"source": "secure@microsoft.com",
"type": "Secondary"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2026-96222",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-10-08T00:00:00+00:00",
"version": "2.0.3"
}
}
]
},
"published": "2026-10-13T19:21:48.030",
"references": [
{
"source": "secure@microsoft.com",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-96222"
}
],
"sourceIdentifier": "secure@microsoft.com",
"vulnStatus": "Awaiting Analysis",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-295"
}
],
"source": "secure@microsoft.com",
"type": "Secondary"
}
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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