{"id":"CVE-2026-62750","aliases":["EUVD-2026-56372","GHSA-r648-f5mp-m4x9"],"status":"published","title":"Windows HTTP Protocol Stack Tampering Vulnerability","description":"Partial string comparison in Windows HTTP Protocol Stack allows an unauthorized attacker to perform tampering over an adjacent network.","severity":{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00677,"percentile":0.52582,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-187"],"published":"2026-08-11T17:04:18Z","modified":"2026-11-10T21:58:00Z","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-2026-62750","tags":["vendor-advisory","patch","Patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-62750"},{"url":"https://github.com/advisories/GHSA-r648-f5mp-m4x9"}],"sources":{"cve":[{"id":"CVE-2026-62750","title":"Windows HTTP Protocol Stack Tampering Vulnerability","description":"Partial string comparison in Windows HTTP Protocol Stack allows an unauthorized attacker to perform tampering over an adjacent network.","status":"published","published":"2026-08-11T17:04:18.553Z","modified":"2026-11-10T21:58:00.738Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C","level":"medium","assessor":"cna"}],"cwes":["CWE-187"],"updated_at":"2026-11-10T22:48:51.483784Z"}],"euvd":[{"id":"EUVD-2026-56372","description":"Partial string comparison in Windows HTTP Protocol Stack allows an unauthorized attacker to perform tampering over an adjacent network.","status":"published","published":"2026-08-11T17:04:18Z","modified":"2026-11-10T21:58:00Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C","level":"medium"}],"updated_at":"2026-11-10T23:24:18.338578Z"}],"ghsa":[{"id":"GHSA-r648-f5mp-m4x9","title":"Partial string comparison in Windows HTTP Protocol Stack allows an unauthorized attacker to...","description":"Partial string comparison in Windows HTTP Protocol Stack allows an unauthorized attacker to perform tampering over an adjacent network.","status":"published","published":"2026-08-11T18:31:19Z","modified":"2026-08-11T18:31:25Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"medium"}],"cwes":["CWE-187"],"updated_at":"2026-11-02T15:10:19.387522Z"}],"nvd":[{"id":"CVE-2026-62750","description":"Partial string comparison in Windows HTTP Protocol Stack allows an unauthorized attacker to perform tampering over an adjacent network.","status":"published","published":"2026-08-11T17:18:27.367Z","modified":"2026-08-16T19:17:00.48Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-187"],"updated_at":"2026-11-02T14:12:36.499002Z"}]}}