{"id":"CVE-2021-42757","aliases":["EUVD-2021-29715","GHSA-8xwq-gmgr-vq48"],"status":"published","title":"A buffer overflow [CWE-121] in the TFTP client library of FortiOS before 6.4.7 and FortiOS 7.0.0...","description":"A buffer overflow [CWE-121] in the TFTP client library of FortiOS before 6.4.7 and FortiOS 7.0.0 through 7.0.2, may allow an authenticated local attacker to achieve arbitrary code execution via specially crafted command line arguments.","severity":{"version":"3.1","score":6.3,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:P/RL:U/RC:C","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00516,"percentile":0.44375,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-120","CWE-787"],"published":"2021-12-08T11:01:11Z","modified":"2026-06-17T04:10:05Z","products":[{"vendor":"fortinet","product":"fortiadc"},{"vendor":"fortinet","product":"fortianalyzer"},{"vendor":"fortinet","product":"fortiddos"},{"vendor":"fortinet","product":"fortiddos-f"},{"vendor":"fortinet","product":"fortimail"},{"vendor":"fortinet","product":"fortimanager"},{"vendor":"fortinet","product":"fortindr"},{"vendor":"fortinet","product":"fortios"},{"vendor":"fortinet","product":"fortios-6k7k"},{"vendor":"fortinet","product":"fortiportal"},{"vendor":"fortinet","product":"fortiproxy"},{"vendor":"fortinet","product":"fortirecorder"},{"vendor":"fortinet","product":"fortirecorder_firmware"},{"vendor":"fortinet","product":"fortiswitch"},{"vendor":"fortinet","product":"fortivoice"},{"vendor":"fortinet","product":"fortiweb"}],"references":[{"url":"https://fortiguard.com/advisory/FG-IR-21-173","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-42757"},{"url":"https://github.com/advisories/GHSA-8xwq-gmgr-vq48"}],"sources":{"cve":[{"id":"CVE-2021-42757","description":"A buffer overflow [CWE-121] in the TFTP client library of FortiOS before 6.4.7 and FortiOS 7.0.0 through 7.0.2, may allow an authenticated local attacker to achieve arbitrary code execution via specially crafted command line arguments.","status":"published","published":"2021-12-08T11:01:11Z","modified":"2025-10-16T09:46:26.239Z","cvss":[{"version":"3.1","score":6.3,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:P/RL:U/RC:C","level":"medium","assessor":"cna"}],"cwes":["CWE-120"],"updated_at":"2026-11-02T14:32:58.739039Z"}],"euvd":[{"id":"EUVD-2021-29715","description":"A buffer overflow [CWE-121] in the TFTP client library of FortiOS before 6.4.7 and FortiOS 7.0.0 through 7.0.2, may allow an authenticated local attacker to achieve arbitrary code execution via specially crafted command line arguments.","status":"published","published":"2021-12-08T11:01:11Z","modified":"2025-10-16T09:46:26Z","cvss":[{"version":"3.1","score":6.3,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:P/RL:U/RC:C","level":"medium"}],"updated_at":"2026-11-02T20:31:31.065489Z"}],"ghsa":[{"id":"GHSA-8xwq-gmgr-vq48","title":"A buffer overflow [CWE-121] in the TFTP client library of FortiOS before 6.4.7 and FortiOS 7.0.0...","description":"A buffer overflow [CWE-121] in the TFTP client library of FortiOS before 6.4.7 and FortiOS 7.0.0 through 7.0.2, may allow an authenticated local attacker to achieve arbitrary code execution via specially crafted command line arguments.","status":"published","published":"2021-12-09T00:01:08Z","modified":"2023-08-29T21:30:20Z","cvss":[{"version":"3.1","score":6.7,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","level":"medium"}],"cwes":["CWE-120","CWE-787"],"updated_at":"2026-11-02T14:54:46.481792Z"}],"nvd":[{"id":"CVE-2021-42757","description":"A buffer overflow [CWE-121] in the TFTP client library of FortiOS before 6.4.7 and FortiOS 7.0.0 through 7.0.2, may allow an authenticated local attacker to achieve arbitrary code execution via specially crafted command line arguments.","status":"published","published":"2021-12-08T11:15:11.84Z","modified":"2026-06-17T04:10:05Z","cvss":[{"version":"3.1","score":6.7,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","level":"medium","assessor":"secondary"},{"version":"3.1","score":6.7,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","level":"medium","assessor":"primary"},{"version":"2.0","score":4.6,"vector":"AV:L/AC:L/Au:N/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-120","CWE-787"],"updated_at":"2026-11-02T14:07:01.811115Z"}]}}