{"id":"CVE-2026-97801","title":"Improper validation of specified type of input in .NET Framework allows an unauthorized attacker to perform tampering over a network.","summary":"Improper validation of specified type of input in .NET Framework allows an unauthorized attacker to perform tampering over a network.","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","cwe":["CWE-1287"],"published":"2026-10-13","updated":"2026-10-13","sourceUpdated":"2026-10-13T23:19:33.740","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-97801","references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-97801","label":"secure@microsoft.com"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-97801.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-97801"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2551867"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-97801"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-97801"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"ingestedAt":"2026-10-13T19:43:29.308Z","vendor":"Microsoft","product":"Microsoft .NET Framework 3.5","affected":[".net_framework_3.5 >= 3.5.0 < 2.0.50727.9188 AND 3.0.30729.9171",".net_framework_3.5_and_4.6.2_4.7_4.7.1_4.7.2 >= 3.0.0.0 < 2.0.50727.8987 AND 3.0.30729.8982 AND 4.7.4150.0",".net_framework_3.5_and_4.7.2 >= 4.7.0 < 2.0.50727.9073 AND 3.0.30729.9070 AND 4.7.4150.0",".net_framework_3.5_and_4.8 >= 4.8.0 < 2.0.50727.9073 AND 3.0.30729.9070 AND 4.8.4811.0",".net_framework_3.5_and_4.8.1 >= 4.8.1 < 2.0.50727.9188 AND 3.0.30729.9171 AND 4.8.9363.0",".net_framework_4.6.2_4.7_4.7.1_4.7.2 >= 4.7.0 < 4.7.4150.0",".net_framework_4.8 >= 4.8.0 < 4.8.4811.0",".net_framework_4.8.1 >= 4.8.0.0 < 4.8.9363.0"],"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-10-13T22:14:29.433528Z"},"epss":0.00734,"epssPercentile":0.5419,"slug":"CVE-2026-97801","body":"## Overview\n\nImproper validation of specified type of input in .NET Framework allows an unauthorized attacker to perform tampering over a network.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Important · updated 2026-10-23 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-97801.json)","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}