{"id":"CVE-2026-96248","aliases":["EUVD-2026-99758","GHSA-fr2m-72xr-wc6v"],"status":"published","title":"Windows Host Guardian Service Denial of Service Vulnerability","description":"Stack-based buffer overflow in Windows Host Guardian Service allows an unauthorized attacker to deny service over a network.","severity":{"version":"3.1","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","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.01125,"percentile":0.66687,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-121"],"published":"2026-10-13T19:00:32Z","modified":"2026-11-10T20:40:20Z","products":[{"vendor":"microsoft","product":"windows 10 version 1607"},{"vendor":"microsoft","product":"windows 10 version 1809"},{"vendor":"microsoft","product":"windows server 2016"},{"vendor":"microsoft","product":"windows server 2016 (server core installation)"},{"vendor":"microsoft","product":"windows server 2019"},{"vendor":"microsoft","product":"windows server 2019 (server core installation)"},{"vendor":"microsoft","product":"windows server 2022"},{"vendor":"microsoft","product":"windows server 2025"},{"vendor":"microsoft","product":"windows server 2025 (server core installation)"},{"vendor":"microsoft","product":"windows_10_1607"},{"vendor":"microsoft","product":"windows_10_1809"},{"vendor":"microsoft","product":"windows_server_2016"},{"vendor":"microsoft","product":"windows_server_2019"},{"vendor":"microsoft","product":"windows_server_2022"},{"vendor":"microsoft","product":"windows_server_2025"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-96248","tags":["vendor-advisory","patch","Patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-96248"},{"url":"https://github.com/advisories/GHSA-fr2m-72xr-wc6v"}],"sources":{"cve":[{"id":"CVE-2026-96248","title":"Windows Host Guardian Service Denial of Service Vulnerability","description":"Stack-based buffer overflow in Windows Host Guardian Service allows an unauthorized attacker to deny service over a network.","status":"published","published":"2026-10-13T19:00:32.458Z","modified":"2026-11-10T20:40:20.714Z","cvss":[{"version":"3.1","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","level":"high","assessor":"cna"}],"cwes":["CWE-121"],"updated_at":"2026-11-10T22:18:30.298108Z"}],"euvd":[{"id":"EUVD-2026-99758","description":"Stack-based buffer overflow in Windows Host Guardian Service allows an unauthorized attacker to deny service over a network.","status":"published","published":"2026-10-13T19:00:32Z","modified":"2026-11-10T20:40:20Z","cvss":[{"version":"3.1","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","level":"high"}],"updated_at":"2026-11-10T22:23:58.54025Z"}],"ghsa":[{"id":"GHSA-fr2m-72xr-wc6v","title":"Stack-based buffer overflow in Windows Host Guardian Service allows an unauthorized attacker to...","description":"Stack-based buffer overflow in Windows Host Guardian Service allows an unauthorized attacker to deny service over a network.","status":"published","published":"2026-10-13T21:36:59Z","modified":"2026-10-13T21:37:07Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-121"],"updated_at":"2026-11-02T15:13:19.647865Z"}],"nvd":[{"id":"CVE-2026-96248","description":"Stack-based buffer overflow in Windows Host Guardian Service allows an unauthorized attacker to deny service over a network.","status":"published","published":"2026-10-13T19:21:50.773Z","modified":"2026-10-16T16:08:35.433Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-121"],"updated_at":"2026-11-02T14:12:58.13117Z"}]}}