CVE-2026-97801

Improper validation of specified type of input in .NET Framework allows an unauthorized attacker to perform tampering over a network.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-97801

Configurations

No configuration.

History

13 Oct 2026, 19:22

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-13 19:22

Updated : 2026-10-13 23:19

NVD link : CVE-2026-97801

Mitre link : CVE-2026-97801

CVE.ORG link : CVE-2026-97801

JSON object : View

Products Affected

No product.

CWE

CWE-1287

Improper Validation of Specified Type of Input

{"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"}