{"id":"CVE-2026-97801","revision":"76998b259cc4454f8fd7998e931ff99b","records":[{"revision":"76998b259cc4454f8fd7998e931ff99b","observedAt":"2026-10-23T18:48:20.63+00:00","statement":{"source":"cve-program","id":"CVE-2026-97801","aliases":[],"title":".NET Framework Tampering Vulnerability","description":"Improper validation of specified type of input in .NET Framework allows an unauthorized attacker to perform tampering over a network.","state":0,"publishedAt":"2026-10-13T19:01:45.603+00:00","modifiedAt":"2026-10-23T17:56:11.021+00:00","affected":[{"ecosystem":"Vendor product","name":"Microsoft .NET Framework 3.5","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"Microsoft\",\n                    \"product\": \"Microsoft .NET Framework 3.5\",\n                    \"platforms\": [\n                        \"Windows 11 version 26H1\",\n                        \"Windows Server 2012\",\n                        \"Windows Server 2012 R2\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"3.5.0\",\n                            \"lessThan\": \"2.0.50727.9188 AND 3.0.30729.9171\",\n                            \"versionType\": \"custom\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"Microsoft\",\n                    \"product\": \"Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2\",\n                    \"platforms\": [\n                        \"Windows 10 version 1607\",\n                        \"Windows Server 2016\",\n                        \"Windows Server 2019\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"3.0.0.0\",\n                            \"lessThan\": \"2.0.50727.8987 AND 3.0.30729.8982 AND 4.7.4150.0\",\n                            \"versionType\": \"custom\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Microsoft .NET Framework 3.5 AND 4.7.2","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"Microsoft\",\n                    \"product\": \"Microsoft .NET Framework 3.5 AND 4.7.2\",\n                    \"platforms\": [\n                        \"Windows 10 version 1809\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"4.7.0\",\n                            \"lessThan\": \"2.0.50727.9073 AND 3.0.30729.9070 AND 4.7.4150.0\",\n                            \"versionType\": \"custom\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Microsoft .NET Framework 3.5 AND 4.8","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"Microsoft\",\n                    \"product\": \"Microsoft .NET Framework 3.5 AND 4.8\",\n                    \"platforms\": [\n                        \"Windows 10 version 1809\",\n                        \"Windows 10 version 21H2\",\n                        \"Windows 10 version 22H2\",\n                        \"Windows Server 2019\",\n                        \"Windows Server 2022\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"4.8.0\",\n                            \"lessThan\": \"2.0.50727.9073 AND 3.0.30729.9070 AND 4.8.4811.0\",\n                            \"versionType\": \"custom\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Microsoft .NET Framework 3.5 AND 4.8.1","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"Microsoft\",\n                    \"product\": \"Microsoft .NET Framework 3.5 AND 4.8.1\",\n                    \"platforms\": [\n                        \"Windows 10 version 21H2\",\n                        \"Windows 10 version 22H2\",\n                        \"Windows 11 version 23H2\",\n                        \"Windows 11 version 24H2\",\n                        \"Windows 11 version 25H2\",\n                        \"Windows 11 version 26H2\",\n                        \"Windows Server 2022\",\n                        \"Windows Server 2025\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"4.8.1\",\n                            \"lessThan\": \"2.0.50727.9188 AND 3.0.30729.9171 AND 4.8.9363.0\",\n                            \"versionType\": \"custom\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"Microsoft\",\n                    \"product\": \"Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2\",\n                    \"platforms\": [\n                        \"Windows Server 2012\",\n                        \"Windows Server 2012 R2\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"4.7.0\",\n                            \"lessThan\": \"4.7.4150.0\",\n                            \"versionType\": \"custom\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Microsoft .NET Framework 4.8","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"Microsoft\",\n                    \"product\": \"Microsoft .NET Framework 4.8\",\n                    \"platforms\": [\n                        \"Windows 10 version 1607\",\n                        \"Windows Server 2012\",\n                        \"Windows Server 2012 R2\",\n                        \"Windows Server 2016\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"4.8.0\",\n                            \"lessThan\": \"4.8.4811.0\",\n                            \"versionType\": \"custom\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Microsoft .NET Framework 4.8.1","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"Microsoft\",\n                    \"product\": \"Microsoft .NET Framework 4.8.1\",\n                    \"platforms\": [\n                        \"Windows 11 version 26H1\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"4.8.0.0\",\n                            \"lessThan\": \"4.8.9363.0\",\n                            \"versionType\": \"custom\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C","score":7.5,"severity":"HIGH"}],"references":["https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-97801"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-97801","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-97801","identifiers":["CVE-2026-97801"]},"retained":false,"historicalAffected":[]}],"coverage":[]}