CVE-2026-97801
Status: Awaiting AnalysisHigh (7.5)—
Improper validation of specified type of input in .NET Framework allows an unauthorized attacker to perform tampering over a network.
CVSS
- Version: 3.1
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
- Base score: 7.5
Exploitation probability (EPSS)
FIRST hasn't scored this CVE yet (usual for very recent or rejected CVEs).
EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).
🎯 ATT&CK techniques
How this vulnerability is exploited and what the attacker gains, in MITRE ATT&CK terms.
- Exploitation
T1190Exploit Public-Facing Applicationinitial access90 % - Primary impact
T1565Data Manipulationimpact70 %
El vector es AV:N/PR:N/UI:N, sin privilegios ni interacción, y la descripción indica manipulación ('tampering') por red sin detallar el tipo de datos; se asigna T1565 genérico.
Inferred by our analysis agent from the official description, CVSS vector and CWE, and checked by a supervisor. May contain errors.
🛡️ ATT&CK mitigations that cover these techniques
Affected technologies (1)
⚠ AI-inferred from the description — NVD hasn't analyzed this CVE yet, these aren't verified CPEs.
CWEs
- CWE-1287
References
Raw JSON (NVD)
Show
{
"id": "CVE-2026-97801",
"cveTags": [],
"metrics": {
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2026-97801",
"role": "CISA Coordinator",
"options": [
{
"exploitation": "none"
},
{
"automatable": "yes"
},
{
"technicalImpact": "partial"
}
],
"version": "2.0.3",
"timestamp": "2026-10-13T22:14:29.433528Z"
}
}
],
"cvssMetricV31": [
{
"type": "Secondary",
"source": "secure@microsoft.com",
"cvssData": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 7.5,
"attackVector": "NETWORK",
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
"integrityImpact": "HIGH",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "NONE",
"privilegesRequired": "NONE",
"confidentialityImpact": "NONE"
},
"impactScore": 3.6,
"exploitabilityScore": 3.9
}
]
},
"affected": [
{
"source": "secure@microsoft.com",
"affectedData": [
{
"vendor": "Microsoft",
"product": "Microsoft .NET Framework 3.5",
"versions": [
{
"status": "affected",
"version": "3.5.0",
"lessThan": "2.0.50727.9188 AND 3.0.30729.9171",
"versionType": "custom"
}
],
"platforms": [
"Windows 11 version 26H1",
"Windows Server 2012",
"Windows Server 2012 R2"
]
},
{
"vendor": "Microsoft",
"product": "Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2",
"versions": [
{
"status": "affected",
"version": "3.0.0.0",
"lessThan": "2.0.50727.8987 AND 3.0.30729.8982 AND 4.7.4150.0",
"versionType": "custom"
}
],
"platforms": [
"Windows 10 version 1607",
"Windows Server 2016",
"Windows Server 2019"
]
},
{
"vendor": "Microsoft",
"product": "Microsoft .NET Framework 3.5 AND 4.7.2",
"versions": [
{
"status": "affected",
"version": "4.7.0",
"lessThan": "2.0.50727.9073 AND 3.0.30729.9070 AND 4.7.4150.0",
"versionType": "custom"
}
],
"platforms": [
"Windows 10 version 1809"
]
},
{
"vendor": "Microsoft",
"product": "Microsoft .NET Framework 3.5 AND 4.8",
"versions": [
{
"status": "affected",
"version": "4.8.0",
"lessThan": "2.0.50727.9073 AND 3.0.30729.9070 AND 4.8.4811.0",
"versionType": "custom"
}
],
"platforms": [
"Windows 10 version 1809",
"Windows 10 version 21H2",
"Windows 10 version 22H2",
"Windows Server 2019",
"Windows Server 2022"
]
},
{
"vendor": "Microsoft",
"product": "Microsoft .NET Framework 3.5 AND 4.8.1",
"versions": [
{
"status": "affected",
"version": "4.8.1",
"lessThan": "2.0.50727.9188 AND 3.0.30729.9171 AND 4.8.9363.0",
"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"
]
},
{
"vendor": "Microsoft",
"product": "Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2",
"versions": [
{
"status": "affected",
"version": "4.7.0",
"lessThan": "4.7.4150.0",
"versionType": "custom"
}
],
"platforms": [
"Windows Server 2012",
"Windows Server 2012 R2"
]
},
{
"vendor": "Microsoft",
"product": "Microsoft .NET Framework 4.8",
"versions": [
{
"status": "affected",
"version": "4.8.0",
"lessThan": "4.8.4811.0",
"versionType": "custom"
}
],
"platforms": [
"Windows 10 version 1607",
"Windows Server 2012",
"Windows Server 2012 R2",
"Windows Server 2016"
]
},
{
"vendor": "Microsoft",
"product": "Microsoft .NET Framework 4.8.1",
"versions": [
{
"status": "affected",
"version": "4.8.0.0",
"lessThan": "4.8.9363.0",
"versionType": "custom"
}
],
"platforms": [
"Windows 11 version 26H1"
]
}
]
}
],
"published": "2026-10-13T19:22:18.023",
"references": [
{
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-97801",
"source": "secure@microsoft.com"
}
],
"vulnStatus": "Awaiting Analysis",
"weaknesses": [
{
"type": "Secondary",
"source": "secure@microsoft.com",
"description": [
{
"lang": "en",
"value": "CWE-1287"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Improper validation of specified type of input in .NET Framework allows an unauthorized attacker to perform tampering over a network."
}
],
"lastModified": "2026-10-13T23:19:33.740",
"sourceIdentifier": "secure@microsoft.com"
}