{"id":"CVE-2020-14993","aliases":["EUVD-2020-7123","GHSA-56hp-cj87-42wh"],"status":"published","title":"A stack-based buffer overflow on DrayTek Vigor2960, Vigor3900, and Vigor300B devices before 1.5.1...","description":"A stack-based buffer overflow on DrayTek Vigor2960, Vigor3900, and Vigor300B devices before 1.5.1.1 allows remote attackers to execute arbitrary code via the formuserphonenumber parameter in an authusersms action to mainfunction.cgi.","severity":{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.05544,"percentile":0.92892,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-787"],"published":"2020-06-23T11:50:58Z","modified":"2026-06-17T02:55:53Z","products":[{"vendor":"draytek","product":"vigor2960_firmware"},{"vendor":"draytek","product":"vigor300b_firmware"},{"vendor":"draytek","product":"vigor3900_firmware"}],"references":[{"url":"https://github.com/dexterone/Vigor-poc","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory"]},{"url":"https://www.draytek.com/about/security-advisory","tags":["x_refsource_MISC","x_transferred","Vendor Advisory"]},{"url":"https://www.draytek.com/about/security-advisory/vigor3900-/-vigor2960-/-vigor300b-stack-based-buffer-overflow-vulnerability-%28cve-2020-14473%29","tags":["x_refsource_CONFIRM","x_transferred"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-14993"},{"url":"https://www.draytek.com/about/security-advisory/vigor3900-/-vigor2960-/-vigor300b-stack-based-buffer-overflow-vulnerability-(cve-2020-14473)"},{"url":"https://github.com/advisories/GHSA-56hp-cj87-42wh"}],"sources":{"cve":[{"id":"CVE-2020-14993","description":"A stack-based buffer overflow on DrayTek Vigor2960, Vigor3900, and Vigor300B devices before 1.5.1.1 allows remote attackers to execute arbitrary code via the formuserphonenumber parameter in an authusersms action to mainfunction.cgi.","status":"published","published":"2020-06-23T11:50:58Z","modified":"2024-08-04T13:00:52.17Z","updated_at":"2026-11-02T14:35:46.129376Z"}],"euvd":[{"id":"EUVD-2020-7123","description":"A stack-based buffer overflow on DrayTek Vigor2960, Vigor3900, and Vigor300B devices before 1.5.1.1 allows remote attackers to execute arbitrary code via the formuserphonenumber parameter in an authusersms action to mainfunction.cgi.","status":"published","published":"2020-06-23T11:50:58Z","modified":"2024-08-04T13:00:52Z","updated_at":"2026-11-03T03:07:33.617168Z"}],"ghsa":[{"id":"GHSA-56hp-cj87-42wh","title":"A stack-based buffer overflow on DrayTek Vigor2960, Vigor3900, and Vigor300B devices before 1.5.1...","description":"A stack-based buffer overflow on DrayTek Vigor2960, Vigor3900, and Vigor300B devices before 1.5.1.1 allows remote attackers to execute arbitrary code via the formuserphonenumber parameter in an authusersms action to mainfunction.cgi.","status":"published","published":"2022-05-24T17:21:30Z","modified":"2023-01-29T05:03:25Z","updated_at":"2026-11-02T14:45:19.009235Z"}],"nvd":[{"id":"CVE-2020-14993","description":"A stack-based buffer overflow on DrayTek Vigor2960, Vigor3900, and Vigor300B devices before 1.5.1.1 allows remote attackers to execute arbitrary code via the formuserphonenumber parameter in an authusersms action to mainfunction.cgi.","status":"published","published":"2020-06-23T12:15:13.503Z","modified":"2026-06-17T02:55:53.147Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/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-787"],"updated_at":"2026-11-02T14:06:07.249892Z"}]}}