{"id":"CVE-2026-108398","aliases":[],"title":".NET Framework Security Feature Bypass Vulnerability","titleSource":"microsoft","descriptionSource":"microsoft","products":[{"vendor":"Microsoft","name":"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","status":"affected","lessThan":"2.0.50727.8987 AND 3.0.30729.8982 AND 4.7.4150.0","versionType":"custom"}],"source":"microsoft","url":"https://www.cve.org/CVERecord?id=CVE-2026-108398"},{"vendor":"Microsoft","name":"Microsoft .NET Framework 3.5 AND 4.7.2","platforms":["Windows 10 version 1809"],"versions":[{"version":"4.7.0","status":"affected","lessThan":"2.0.50727.9073 AND 3.0.30729.9070 AND 4.7.4150.0","versionType":"custom"}],"source":"microsoft","url":"https://www.cve.org/CVERecord?id=CVE-2026-108398"},{"vendor":"Microsoft","name":"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","status":"affected","lessThan":"2.0.50727.9073 AND 3.0.30729.9070 AND 4.8.4811.0","versionType":"custom"}],"source":"microsoft","url":"https://www.cve.org/CVERecord?id=CVE-2026-108398"},{"vendor":"Microsoft","name":"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","status":"affected","lessThan":"2.0.50727.9188 AND 3.0.30729.9171 AND 4.8.9363.0","versionType":"custom"}],"source":"microsoft","url":"https://www.cve.org/CVERecord?id=CVE-2026-108398"},{"vendor":"Microsoft","name":"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","status":"affected","lessThan":"4.7.4150.0","versionType":"custom"}],"source":"microsoft","url":"https://www.cve.org/CVERecord?id=CVE-2026-108398"},{"vendor":"Microsoft","name":"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","status":"affected","lessThan":"4.8.4811.0","versionType":"custom"}],"source":"microsoft","url":"https://www.cve.org/CVERecord?id=CVE-2026-108398"},{"vendor":"Microsoft","name":"Microsoft .NET Framework 4.8.1","platforms":["Windows 11 version 26H1"],"versions":[{"version":"4.8.0.0","status":"affected","lessThan":"4.8.9363.0","versionType":"custom"}],"source":"microsoft","url":"https://www.cve.org/CVERecord?id=CVE-2026-108398"}],"remediation":[],"description":"Untrusted search path in .NET Framework allows an authorized attacker to bypass a security feature locally.","severity":"high","score":8.8,"published":"2026-10-13T18:59:30.926Z","modified":"2026-10-27T21:24:02.948Z","withdrawn":false,"knownExploited":false,"affected":[],"references":["https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-108398"],"sources":[{"name":"CVE","id":"CVE-2026-108398","modified":"2026-10-27T21:24:02.948Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-108398"}],"assessments":[{"source":"microsoft","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C","score":8.8}],"sourceAffected":[],"kev":{"status":"not-listed","checkedAt":"2026-10-28T17:40:30.934Z"},"coverage":[{"source":"NVD","status":"not-checked"},{"source":"GHSA","status":"not-checked"},{"source":"EUVD","status":"not-checked"},{"source":"EPSS","status":"not-checked"}],"evidence":[]}