{"id":"CVE-2026-97830","aliases":[],"title":"Windows Internet Information Services Denial of Service Vulnerability","titleSource":"microsoft","descriptionSource":"microsoft","products":[{"vendor":"Microsoft","name":"Windows 11 version 23H2","platforms":["ARM64-based Systems"],"versions":[{"version":"10.0.22631.0","status":"affected","lessThan":"10.0.22631.7652","versionType":"custom"}],"source":"microsoft","url":"https://www.cve.org/CVERecord?id=CVE-2026-97830"},{"vendor":"Microsoft","name":"Windows 11 Version 23H2","platforms":["x64-based Systems"],"versions":[{"version":"10.0.22631.0","status":"affected","lessThan":"10.0.22631.7652","versionType":"custom"}],"source":"microsoft","url":"https://www.cve.org/CVERecord?id=CVE-2026-97830"},{"vendor":"Microsoft","name":"Windows 11 Version 24H2","platforms":["ARM64-based Systems","x64-based Systems"],"versions":[{"version":"10.0.26100.0","status":"affected","lessThan":"10.0.26100.9711","versionType":"custom"}],"source":"microsoft","url":"https://www.cve.org/CVERecord?id=CVE-2026-97830"},{"vendor":"Microsoft","name":"Windows 11 Version 25H2","platforms":["ARM64-based Systems","x64-based Systems"],"versions":[{"version":"10.0.26200.0","status":"affected","lessThan":"10.0.26200.9711","versionType":"custom"}],"source":"microsoft","url":"https://www.cve.org/CVERecord?id=CVE-2026-97830"},{"vendor":"Microsoft","name":"Windows 11 version 26H1","platforms":["ARM64-based Systems","x64-based Systems"],"versions":[{"version":"10.0.28000.0","status":"affected","lessThan":"10.0.28000.3231","versionType":"custom"}],"source":"microsoft","url":"https://www.cve.org/CVERecord?id=CVE-2026-97830"},{"vendor":"Microsoft","name":"Windows 11 Version 26H2","platforms":["ARM64-based Systems","x64-based Systems"],"versions":[{"version":"10.0.26300.0","status":"affected","lessThan":"10.0.26300.9711","versionType":"custom"}],"source":"microsoft","url":"https://www.cve.org/CVERecord?id=CVE-2026-97830"},{"vendor":"Microsoft","name":"Windows Server 2022","platforms":["x64-based Systems"],"versions":[{"version":"10.0.20348.0","status":"affected","lessThan":"10.0.20348.5761","versionType":"custom"}],"source":"microsoft","url":"https://www.cve.org/CVERecord?id=CVE-2026-97830"},{"vendor":"Microsoft","name":"Windows Server 2025","platforms":["x64-based Systems"],"versions":[{"version":"10.0.26100.0","status":"affected","lessThan":"10.0.26100.33650","versionType":"custom"}],"source":"microsoft","url":"https://www.cve.org/CVERecord?id=CVE-2026-97830"},{"vendor":"Microsoft","name":"Windows Server 2025 (Server Core installation)","platforms":["x64-based Systems"],"versions":[{"version":"10.0.26100.0","status":"affected","lessThan":"10.0.26100.33650","versionType":"custom"}],"source":"microsoft","url":"https://www.cve.org/CVERecord?id=CVE-2026-97830"}],"remediation":[],"description":"Double free in Windows Internet Information Services allows an unauthorized attacker to deny service over a network.","severity":"high","score":7.5,"published":"2026-10-13T19:01:40.304Z","modified":"2026-10-28T18:22:16.947Z","withdrawn":false,"knownExploited":false,"affected":[],"references":["https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-97830"],"sources":[{"name":"CVE","id":"CVE-2026-97830","modified":"2026-10-28T18:22:16.947Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-97830"}],"assessments":[{"source":"microsoft","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C","score":7.5}],"sourceAffected":[],"kev":{"status":"not-listed","checkedAt":"2026-10-29T02:20:33.012Z"},"coverage":[{"source":"NVD","status":"available","checkedAt":"2026-10-28T08:15:35.608Z","attemptedAt":"2026-10-28T08:15:35.608Z"},{"source":"GHSA","status":"refresh-failed","attemptedAt":"2026-10-28T08:15:32.355Z"},{"source":"EUVD","status":"available","checkedAt":"2026-10-28T08:15:36.385Z","attemptedAt":"2026-10-28T08:15:36.385Z"},{"source":"EPSS","status":"available","checkedAt":"2026-10-28T08:15:35.807Z","attemptedAt":"2026-10-28T08:15:35.807Z"}],"evidence":[{"source":"NVD","id":"CVE-2026-97830","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-97830","modified":"2026-10-14T20:19:55.197","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","checkedAt":"2026-10-28T08:15:35.608Z"},{"source":"FIRST EPSS","id":"CVE-2026-97830","url":"https://www.first.org/epss/","probability":0.01073,"percentile":0.64739,"date":"2026-10-27","checkedAt":"2026-10-28T08:15:35.807Z"},{"source":"ENISA EUVD","id":"EUVD-2026-100431","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-100431","modified":"Oct 27, 2026, 9:36:58 PM","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C","checkedAt":"2026-10-28T08:15:36.385Z"}]}