{"id":"CVE-2026-62735","aliases":["EUVD-2026-56366","GHSA-jhr5-7989-3r59"],"status":"published","title":"Windows HTTP.sys Elevation of Privilege Vulnerability","description":"Heap-based buffer overflow in Windows HTTP.sys allows an authorized attacker to elevate privileges locally.","severity":{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00866,"percentile":0.58987,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":false},"cwes":["CWE-122","CWE-190"],"published":"2026-08-11T17:04:15Z","modified":"2026-11-10T21:57:57Z","exploits":[{"source":"pocgithub","id":"nhh9905/CVE-2026-62735","title":"nhh9905/CVE-2026-62735","date":"2026-08-25","url":"https://github.com/nhh9905/CVE-2026-62735"},{"source":"pocgithub","id":"HackSpeak/CVE-2026-62735","title":"HackSpeak/CVE-2026-62735","date":"2026-09-03","url":"https://github.com/HackSpeak/CVE-2026-62735"}],"products":[{"vendor":"microsoft","product":"windows 10 version 1607"},{"vendor":"microsoft","product":"windows 10 version 1809"},{"vendor":"microsoft","product":"windows 10 version 21h2"},{"vendor":"microsoft","product":"windows 10 version 22h2"},{"vendor":"microsoft","product":"windows 11 version 23h2"},{"vendor":"microsoft","product":"windows 11 version 24h2"},{"vendor":"microsoft","product":"windows 11 version 25h2"},{"vendor":"microsoft","product":"windows 11 version 26h1"},{"vendor":"microsoft","product":"windows server 2012"},{"vendor":"microsoft","product":"windows server 2012 (server core installation)"},{"vendor":"microsoft","product":"windows server 2012 r2"},{"vendor":"microsoft","product":"windows server 2012 r2 (server core installation)"},{"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_10_21h2"},{"vendor":"microsoft","product":"windows_10_22h2"},{"vendor":"microsoft","product":"windows_11_23h2"},{"vendor":"microsoft","product":"windows_11_24h2"},{"vendor":"microsoft","product":"windows_11_25h2"},{"vendor":"microsoft","product":"windows_11_26h1"},{"vendor":"microsoft","product":"windows_server_2012"},{"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-2026-62735","tags":["vendor-advisory","patch","Patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-62735"},{"url":"https://github.com/advisories/GHSA-jhr5-7989-3r59"}],"sources":{"cve":[{"id":"CVE-2026-62735","title":"Windows HTTP.sys Elevation of Privilege Vulnerability","description":"Heap-based buffer overflow in Windows HTTP.sys allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-08-11T17:04:15.04Z","modified":"2026-11-10T21:57:57.449Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"high","assessor":"cna"}],"cwes":["CWE-122","CWE-190"],"updated_at":"2026-11-10T22:48:51.483784Z"}],"euvd":[{"id":"EUVD-2026-56366","description":"Heap-based buffer overflow in Windows HTTP.sys allows an authorized attacker to elevate privileges 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locally.","status":"published","published":"2026-08-11T17:18:25.037Z","modified":"2026-08-16T19:16:58.42Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-122","CWE-190"],"updated_at":"2026-11-02T14:12:36.499002Z"}]}}