{"id":"CVE-2018-0956","aliases":["EUVD-2018-1735","GHSA-g2h3-89xx-5947"],"status":"published","title":"A denial of service vulnerability exists in the HTTP 2.0 protocol stack (HTTP.sys) when HTTP.sys...","description":"A denial of service vulnerability exists in the HTTP 2.0 protocol stack (HTTP.sys) when HTTP.sys improperly parses specially crafted HTTP 2.0 requests, aka \"HTTP.sys Denial of Service Vulnerability.\" This affects Windows Server 2016, Windows 10, Windows 10 Servers.","severity":{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.13693,"percentile":0.96517,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2018-04-12T01:00:00Z","modified":"2026-06-17T01:32:00Z","products":[{"vendor":"microsoft","product":"windows 10"},{"vendor":"microsoft","product":"windows 10 servers"},{"vendor":"microsoft","product":"windows server 2016"},{"vendor":"microsoft","product":"windows_10"},{"vendor":"microsoft","product":"windows_server_2016"}],"references":[{"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-0956","tags":["x_refsource_CONFIRM","x_transferred","Patch","Vendor Advisory"]},{"url":"http://www.securityfocus.com/bid/103650","tags":["vdb-entry","x_refsource_BID","x_transferred","Third Party Advisory","VDB Entry"]},{"url":"http://www.securitytracker.com/id/1040661","tags":["vdb-entry","x_refsource_SECTRACK","x_transferred","Third Party Advisory","VDB Entry"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2018-0956"},{"url":"https://github.com/advisories/GHSA-g2h3-89xx-5947"}],"sources":{"cve":[{"id":"CVE-2018-0956","description":"A denial of service vulnerability exists in the HTTP 2.0 protocol stack (HTTP.sys) when HTTP.sys improperly parses specially crafted HTTP 2.0 requests, aka \"HTTP.sys Denial of Service Vulnerability.\" This affects Windows Server 2016, Windows 10, Windows 10 Servers.","status":"published","published":"2018-04-12T01:00:00Z","modified":"2024-08-05T03:44:11.696Z","updated_at":"2026-11-02T14:35:12.160284Z"}],"euvd":[{"id":"EUVD-2018-1735","description":"A denial of service vulnerability exists in the HTTP 2.0 protocol stack (HTTP.sys) when HTTP.sys improperly parses specially crafted HTTP 2.0 requests, aka \"HTTP.sys Denial of Service Vulnerability.\" This affects Windows Server 2016, Windows 10, Windows 10 Servers.","status":"published","published":"2018-04-12T01:00:00Z","modified":"2024-08-05T03:44:11Z","updated_at":"2026-11-03T02:40:17.442322Z"}],"ghsa":[{"id":"GHSA-g2h3-89xx-5947","title":"A denial of service vulnerability exists in the HTTP 2.0 protocol stack (HTTP.sys) when HTTP.sys...","description":"A denial of service vulnerability exists in the HTTP 2.0 protocol stack (HTTP.sys) when HTTP.sys improperly parses specially crafted HTTP 2.0 requests, aka \"HTTP.sys Denial of Service Vulnerability.\" This affects Windows Server 2016, Windows 10, Windows 10 Servers.","status":"published","published":"2022-05-13T01:18:39Z","modified":"2023-02-01T05:05:21Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T14:50:14.297796Z"}],"nvd":[{"id":"CVE-2018-0956","description":"A denial of service vulnerability exists in the HTTP 2.0 protocol stack (HTTP.sys) when HTTP.sys improperly parses specially crafted HTTP 2.0 requests, aka \"HTTP.sys Denial of Service Vulnerability.\" This affects Windows Server 2016, Windows 10, Windows 10 Servers.","status":"published","published":"2018-04-12T01:29:06.317Z","modified":"2026-06-17T01:32:00.697Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":7.8,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:C","level":"high","assessor":"primary"}],"updated_at":"2026-11-02T14:04:25.506659Z"}]}}