{"id":"CVE-2017-18046","aliases":["EUVD-2017-9186","GHSA-grjw-qj2p-c4f5"],"status":"published","title":"Buffer overflow on Dasan GPON ONT WiFi Router H640X 12.02-01121 2.77p1-1124 and 3.03p2-1146...","description":"Buffer overflow on Dasan GPON ONT WiFi Router H640X 12.02-01121 2.77p1-1124 and 3.03p2-1146 devices allows remote attackers to execute arbitrary code via a long POST request to the login_action function in /cgi-bin/login_action.cgi (aka cgipage.cgi).","severity":{"version":"3.0","score":9.8,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.05045,"percentile":0.92347,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-119"],"published":"2018-01-21T22:00:00Z","modified":"2026-06-17T01:12:06Z","products":[{"vendor":"dasannetworks","product":"h640x_firmware"}],"references":[{"url":"https://twitter.com/ankit_anubhav/status/982261670394249216","tags":["x_refsource_MISC","x_transferred"]},{"url":"https://blogs.securiteam.com/index.php/archives/3552","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory"]},{"url":"https://pastebin.com/Yxd9S46A","tags":["x_refsource_MISC","x_transferred"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2017-18046"},{"url":"https://github.com/advisories/GHSA-grjw-qj2p-c4f5"}],"sources":{"cve":[{"id":"CVE-2017-18046","description":"Buffer overflow on Dasan GPON ONT WiFi Router H640X 12.02-01121 2.77p1-1124 and 3.03p2-1146 devices allows remote attackers to execute arbitrary code via a long POST request to the login_action function in /cgi-bin/login_action.cgi (aka cgipage.cgi).","status":"published","published":"2018-01-21T22:00:00Z","modified":"2024-08-05T21:06:50.137Z","updated_at":"2026-11-02T14:33:22.064284Z"}],"euvd":[{"id":"EUVD-2017-9186","description":"Buffer overflow on Dasan GPON ONT WiFi Router H640X 12.02-01121 2.77p1-1124 and 3.03p2-1146 devices allows remote attackers to execute arbitrary code via a long POST request to the login_action function in /cgi-bin/login_action.cgi (aka cgipage.cgi).","status":"published","published":"2018-01-21T22:00:00Z","modified":"2024-08-05T21:06:50Z","updated_at":"2026-11-03T02:23:08.049216Z"}],"ghsa":[{"id":"GHSA-grjw-qj2p-c4f5","title":"Buffer overflow on Dasan GPON ONT WiFi Router H640X 12.02-01121 2.77p1-1124 and 3.03p2-1146...","description":"Buffer overflow on Dasan GPON ONT WiFi Router H640X 12.02-01121 2.77p1-1124 and 3.03p2-1146 devices allows remote attackers to execute arbitrary code via a long POST request to the login_action function in /cgi-bin/login_action.cgi (aka cgipage.cgi).","status":"published","published":"2022-05-14T03:32:50Z","modified":"2023-02-02T05:08:08Z","cvss":[{"version":"3.0","score":9.8,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-119"],"updated_at":"2026-11-02T14:52:40.925332Z"}],"nvd":[{"id":"CVE-2017-18046","description":"Buffer overflow on Dasan GPON ONT WiFi Router H640X 12.02-01121 2.77p1-1124 and 3.03p2-1146 devices allows remote attackers to execute arbitrary code via a long POST request to the login_action function in /cgi-bin/login_action.cgi (aka cgipage.cgi).","status":"published","published":"2018-01-21T22:29:00.29Z","modified":"2026-06-17T01:12:06.083Z","cvss":[{"version":"3.0","score":9.8,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary"},{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary"}],"cwes":["CWE-119"],"updated_at":"2026-11-02T14:04:13.257031Z"}]}}