{"id":"CVE-2021-34810","aliases":["EUVD-2021-21457","GHSA-473c-wh3w-ppx8"],"status":"published","title":"Improper privilege management vulnerability in cgi component in Synology Download Station before...","description":"Improper privilege management vulnerability in cgi component in Synology Download Station before 3.8.16-3566 allows remote authenticated users to execute arbitrary code via unspecified vectors.","severity":{"version":"3.1","score":9.9,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.01369,"percentile":0.72128,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-269"],"published":"2021-06-18T03:00:22Z","modified":"2026-06-17T03:56:36Z","products":[{"vendor":"qnap systems inc.","product":"download station"},{"vendor":"synology","product":"download station"},{"vendor":"synology","product":"download_station"}],"references":[{"url":"https://www.synology.com/security/advisory/Synology_SA_21_11","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-34810"},{"url":"https://github.com/advisories/GHSA-473c-wh3w-ppx8"}],"sources":{"cve":[{"id":"CVE-2021-34810","description":"Improper privilege management vulnerability in cgi component in Synology Download Station before 3.8.16-3566 allows remote authenticated users to execute arbitrary code via unspecified vectors.","status":"published","published":"2021-06-18T03:00:22.755Z","modified":"2024-09-16T16:14:21.21Z","cvss":[{"version":"3.1","score":9.9,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"critical","assessor":"cna"}],"cwes":["CWE-269"],"updated_at":"2026-11-02T14:33:11.59359Z"}],"euvd":[{"id":"EUVD-2021-21457","description":"Improper privilege management vulnerability in cgi component in Synology Download Station before 3.8.16-3566 allows remote authenticated users to execute arbitrary code via unspecified vectors.","status":"published","published":"2021-06-18T03:00:22Z","modified":"2024-09-16T16:14:21Z","cvss":[{"version":"3.1","score":9.9,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-03T00:55:53.554412Z"}],"ghsa":[{"id":"GHSA-473c-wh3w-ppx8","title":"Improper privilege management vulnerability in cgi component in Synology Download Station before...","description":"Improper privilege management vulnerability in cgi component in Synology Download Station before 3.8.16-3566 allows remote authenticated users to execute arbitrary code via unspecified vectors.","status":"published","published":"2022-05-24T19:05:40Z","modified":"2023-01-29T05:07:04Z","cwes":["CWE-269"],"updated_at":"2026-11-02T14:46:08.723565Z"}],"nvd":[{"id":"CVE-2021-34810","description":"Improper privilege management vulnerability in cgi component in Synology Download Station before 3.8.16-3566 allows remote authenticated users to execute arbitrary code via unspecified vectors.","status":"published","published":"2021-06-18T03:15:06.873Z","modified":"2026-06-17T03:56:36.68Z","cvss":[{"version":"3.1","score":9.9,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"critical","assessor":"secondary"},{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":6.5,"vector":"AV:N/AC:L/Au:S/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-269"],"updated_at":"2026-11-02T14:06:54.892562Z"}]}}