{"id":"CVE-2021-20125","aliases":["EUVD-2021-7582","GHSA-j2q4-4x34-58rx"],"status":"published","title":"An arbitrary file upload and directory traversal vulnerability exists in the file upload...","description":"An arbitrary file upload and directory traversal vulnerability exists in the file upload functionality of DownloadFileServlet in Draytek VigorConnect 1.6.0-B3. An unauthenticated attacker could leverage this vulnerability to upload files to any location on the target operating system with root privileges.","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":0.03948,"percentile":0.90489,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-22","CWE-434"],"published":"2021-10-13T15:48:08Z","modified":"2026-06-17T03:33:18Z","products":[{"vendor":"draytek","product":"vigorconnect"}],"references":[{"url":"https://www.tenable.com/security/research/tra-2021-42","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-20125"},{"url":"https://github.com/advisories/GHSA-j2q4-4x34-58rx"}],"sources":{"cve":[{"id":"CVE-2021-20125","description":"An arbitrary file upload and directory traversal vulnerability exists in the file upload functionality of DownloadFileServlet in Draytek VigorConnect 1.6.0-B3. An unauthenticated attacker could leverage this vulnerability to upload files to any location on the target operating system with root privileges.","status":"published","published":"2021-10-13T15:48:08Z","modified":"2024-08-03T17:30:07.504Z","updated_at":"2026-11-02T14:32:55.564736Z"}],"euvd":[{"id":"EUVD-2021-7582","description":"An arbitrary file upload and directory traversal vulnerability exists in the file upload functionality of DownloadFileServlet in Draytek VigorConnect 1.6.0-B3. An unauthenticated attacker could leverage this vulnerability to upload files to any location on the target operating system with root privileges.","status":"published","published":"2021-10-13T15:48:08Z","modified":"2024-08-03T17:30:07Z","updated_at":"2026-11-03T03:25:09.841069Z"}],"ghsa":[{"id":"GHSA-j2q4-4x34-58rx","title":"An arbitrary file upload and directory traversal vulnerability exists in the file upload...","description":"An arbitrary file upload and directory traversal vulnerability exists in the file upload functionality of DownloadFileServlet in Draytek VigorConnect 1.6.0-B3. An unauthenticated attacker could leverage this vulnerability to upload files to any location on the target operating system with root privileges.","status":"published","published":"2022-05-24T19:17:24Z","modified":"2023-01-30T05:02:46Z","cwes":["CWE-22"],"updated_at":"2026-11-02T14:46:43.162136Z"}],"nvd":[{"id":"CVE-2021-20125","description":"An arbitrary file upload and directory traversal vulnerability exists in the file upload functionality of DownloadFileServlet in Draytek VigorConnect 1.6.0-B3. An unauthenticated attacker could leverage this vulnerability to upload files to any location on the target operating system with root privileges.","status":"published","published":"2021-10-13T16:15:07.437Z","modified":"2026-06-17T03:33:18.94Z","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":10,"vector":"AV:N/AC:L/Au:N/C:C/I:C/A:C","level":"high","assessor":"primary"}],"cwes":["CWE-22","CWE-434"],"updated_at":"2026-11-02T14:06:59.689345Z"}]}}