{"id":"CVE-2026-71921","aliases":["EUVD-2026-64980","GHSA-c34j-h938-5r57"],"status":"published","title":"DrayTek VigorSwitch Multiple Models Pre-Authentication OS Command Injection via setget.cgi","description":"Multiple DrayTek VigorSwitch models contain a pre-authentication command injection vulnerability in the setget.cgi interface. The vulnerability is caused by insufficient filtering of the pass field before command execution. A remote attacker can trigger this vulnerability via crafted input to execute arbitrary commands with root privileges.","severity":{"version":"4.0","score":9.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.02787,"percentile":0.86606,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-78"],"published":"2026-08-24T17:07:50Z","modified":"2026-10-13T09:10:00Z","products":[{"vendor":"draytek corporation","product":"vigorswitch fx2120"},{"vendor":"draytek corporation","product":"vigorswitch g1280"},{"vendor":"draytek corporation","product":"vigorswitch g1282"},{"vendor":"draytek corporation","product":"vigorswitch g2100"},{"vendor":"draytek corporation","product":"vigorswitch g2121"},{"vendor":"draytek corporation","product":"vigorswitch g2280x"},{"vendor":"draytek corporation","product":"vigorswitch g2282x"},{"vendor":"draytek corporation","product":"vigorswitch g2540x"},{"vendor":"draytek corporation","product":"vigorswitch g2540xs"},{"vendor":"draytek corporation","product":"vigorswitch g2542x"},{"vendor":"draytek corporation","product":"vigorswitch p1280"},{"vendor":"draytek corporation","product":"vigorswitch p1281x"},{"vendor":"draytek corporation","product":"vigorswitch p1282"},{"vendor":"draytek corporation","product":"vigorswitch p2100"},{"vendor":"draytek corporation","product":"vigorswitch p2121"},{"vendor":"draytek corporation","product":"vigorswitch p2280x"},{"vendor":"draytek corporation","product":"vigorswitch p2282x"},{"vendor":"draytek corporation","product":"vigorswitch p2540x"},{"vendor":"draytek corporation","product":"vigorswitch p2540xs"},{"vendor":"draytek corporation","product":"vigorswitch p2542x"},{"vendor":"draytek corporation","product":"vigorswitch p2542xh"},{"vendor":"draytek corporation","product":"vigorswitch pq2121x"},{"vendor":"draytek corporation","product":"vigorswitch pq2200xb"},{"vendor":"draytek corporation","product":"vigorswitch pq2300xb"},{"vendor":"draytek corporation","product":"vigorswitch px2060"},{"vendor":"draytek corporation","product":"vigorswitch q2121x"},{"vendor":"draytek corporation","product":"vigorswitch q2200x"},{"vendor":"draytek corporation","product":"vigorswitch q2300x"}],"references":[{"url":"https://www.draytek.com/about/security-advisory/multiple-vulnerabilities-in-vigorswitch-series-august-2026/","tags":["vendor-advisory"]},{"url":"https://www.vulncheck.com/advisories/draytek-vigorswitch-multiple-models-pre-authentication-os-command-injection-via-setget-cgi","tags":["third-party-advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-71921"},{"url":"https://www.draytek.com/about/security-advisory/multiple-vulnerabilities-in-vigorswitch-series-august-2026"},{"url":"https://github.com/advisories/GHSA-c34j-h938-5r57"}],"sources":{"cve":[{"id":"CVE-2026-71921","title":"DrayTek VigorSwitch Multiple Models Pre-Authentication OS Command Injection via setget.cgi","description":"Multiple DrayTek VigorSwitch models contain a pre-authentication command injection vulnerability in the setget.cgi interface. The vulnerability is caused by insufficient filtering of the pass field before command execution. A remote attacker can trigger this vulnerability via crafted input to execute arbitrary commands with root privileges.","status":"published","published":"2026-08-24T17:07:50.939Z","modified":"2026-08-27T13:49:51.843Z","cvss":[{"version":"4.0","score":9.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"critical","assessor":"cna"},{"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":"cna"}],"cwes":["CWE-78"],"updated_at":"2026-11-02T14:19:49.199185Z"}],"euvd":[{"id":"EUVD-2026-64980","description":"Multiple DrayTek VigorSwitch models contain a pre-authentication command injection vulnerability in the setget.cgi interface. The vulnerability is caused by insufficient filtering of the pass field before command execution. A remote attacker can trigger this vulnerability via crafted input to execute arbitrary commands with root privileges.","status":"published","published":"2026-08-24T17:07:50Z","modified":"2026-08-27T13:49:51Z","cvss":[{"version":"4.0","score":9.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"critical"}],"updated_at":"2026-11-02T18:01:28.581047Z"}],"ghsa":[{"id":"GHSA-c34j-h938-5r57","title":"Multiple DrayTek VigorSwitch models contain a pre-authentication command injection vulnerability...","description":"Multiple DrayTek VigorSwitch models contain a pre-authentication command injection vulnerability in the setget.cgi interface. The vulnerability is caused by insufficient filtering of the pass field before command execution. 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A remote attacker can trigger this vulnerability via crafted input to execute arbitrary commands with root privileges.","status":"published","published":"2026-08-24T18:17:07.06Z","modified":"2026-10-13T09:10:00.323Z","cvss":[{"version":"4.0","score":9.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"critical","assessor":"secondary"},{"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":"secondary"}],"cwes":["CWE-78"],"updated_at":"2026-11-02T14:12:41.018848Z"}]}}