CVE-2026-70035
Full vulnerability record from the local CVENow database.
Description
Deserialization of untrusted data in .NET Framework allows an unauthorized attacker to execute code over a network.
Severity
HIGH
CVSS score
8.8
(v3.1)
Vulnerability status
Undergoing Analysis
Source identifier
Published
2026-10-13 19:19:14.490000
Last modified
2026-10-22 22:18:22.253000
View original CVE JSON
{
"id": "CVE-2026-70035",
"sourceIdentifier": "[email protected]",
"published": "2026-10-13T19:19:14.490",
"lastModified": "2026-10-22T22:18:22.253",
"vulnStatus": "Undergoing Analysis",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "Deserialization of untrusted data in .NET Framework allows an unauthorized attacker to execute code over a network."
}
],
"affected": [
{
"source": "[email protected]",
"affectedData": [
{
"vendor": "Microsoft",
"product": ".NET 10.0 runtime",
"versions": [
{
"version": "10.0.0",
"lessThan": "10.0.13",
"versionType": "custom",
"status": "affected"
}
]
},
{
"vendor": "Microsoft",
"product": ".NET 11.0 runtime",
"versions": [
{
"version": "11.0.0",
"lessThan": "11.0.0-rc.2",
"versionType": "custom",
"status": "affected"
}
]
},
{
"vendor": "Microsoft",
"product": ".NET 8.0 runtime",
"versions": [
{
"version": "8.0.0",
"lessThan": "8.0.32",
"versionType": "custom",
"status": "affected"
}
]
},
{
"vendor": "Microsoft",
"product": ".NET 9.0 runtime",
"versions": [
{
"version": "9.0.0",
"lessThan": "9.0.21",
"versionType": "custom",
"status": "affected"
}
]
},
{
"vendor": "Microsoft",
"product": "Microsoft .NET Framework 3.5",
"platforms": [
"Windows 11 version 26H1",
"Windows Server 2012",
"Windows Server 2012 R2"
],
"versions": [
{
"version": "3.5.0",
"lessThan": "2.0.50727.9188 AND 3.0.30729.9171",
"versionType": "custom",
"status": "affected"
}
]
},
{
"vendor": "Microsoft",
"product": "Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2",
"platforms": [
"Windows 10 version 1607",
"Windows Server 2016",
"Windows Server 2019"
],
"versions": [
{
"version": "3.0.0.0",
"lessThan": "2.0.50727.8987 AND 3.0.30729.8982 AND 4.7.4150.0",
"versionType": "custom",
"status": "affected"
}
]
},
{
"vendor": "Microsoft",
"product": "Microsoft .NET Framework 3.5 AND 4.7.2",
"platforms": [
"Windows 10 version 1809"
],
"versions": [
{
"version": "4.7.0",
"lessThan": "2.0.50727.9073 AND 3.0.30729.9070 AND 4.7.4150.0",
"versionType": "custom",
"status": "affected"
}
]
},
{
"vendor": "Microsoft",
"product": "Microsoft .NET Framework 3.5 AND 4.8",
"platforms": [
"Windows 10 version 1809",
"Windows 10 version 21H2",
"Windows 10 version 22H2",
"Windows Server 2019",
"Windows Server 2022"
],
"versions": [
{
"version": "4.8.0",
"lessThan": "2.0.50727.9073 AND 3.0.30729.9070 AND 4.8.4811.0",
"versionType": "custom",
"status": "affected"
}
]
},
{
"vendor": "Microsoft",
"product": "Microsoft .NET Framework 3.5 AND 4.8.1",
"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"
],
"versions": [
{
"version": "4.8.1",
"lessThan": "2.0.50727.9188 AND 3.0.30729.9171 AND 4.8.9363.0",
"versionType": "custom",
"status": "affected"
}
]
},
{
"vendor": "Microsoft",
"product": "Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2",
"platforms": [
"Windows Server 2012",
"Windows Server 2012 R2"
],
"versions": [
{
"version": "4.7.0",
"lessThan": "4.7.4150.0",
"versionType": "custom",
"status": "affected"
}
]
},
{
"vendor": "Microsoft",
"product": "Microsoft .NET Framework 4.8",
"platforms": [
"Windows 10 version 1607",
"Windows Server 2012",
"Windows Server 2012 R2",
"Windows Server 2016"
],
"versions": [
{
"version": "4.8.0",
"lessThan": "4.8.4811.0",
"versionType": "custom",
"status": "affected"
}
]
},
{
"vendor": "Microsoft",
"product": "Microsoft .NET Framework 4.8.1",
"platforms": [
"Windows 11 version 26H1"
],
"versions": [
{
"version": "4.8.0.0",
"lessThan": "4.8.9363.0",
"versionType": "custom",
"status": "affected"
}
]
},
{
"vendor": "Microsoft",
"product": "Microsoft Visual Studio 2022 version 17.14",
"versions": [
{
"version": "17.14.0",
"lessThan": "17.14.42",
"versionType": "custom",
"status": "affected"
}
]
},
{
"vendor": "Microsoft",
"product": "Microsoft Visual Studio 2026 version 18.10",
"versions": [
{
"version": "18.10.0",
"lessThan": "18.10.4",
"versionType": "custom",
"status": "affected"
}
]
}
]
}
],
"metrics": {
"cvssMetricV31": [
{
"source": "[email protected]",
"type": "Secondary",
"cvssData": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"baseScore": 8.8,
"baseSeverity": "HIGH",
"attackVector": "NETWORK",
"attackComplexity": "LOW",
"privilegesRequired": "NONE",
"userInteraction": "REQUIRED",
"scope": "UNCHANGED",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"availabilityImpact": "HIGH"
},
"exploitabilityScore": 2.8,
"impactScore": 5.9
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"timestamp": "2026-10-08T00:00:00+00:00",
"id": "CVE-2026-70035",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "total"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
]
},
"weaknesses": [
{
"source": "[email protected]",
"type": "Secondary",
"description": [
{
"lang": "en",
"value": "CWE-502"
}
]
}
],
"references": [
{
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70035",
"source": "[email protected]"
}
]
}