{"schemaVersion":3,"id":"CVE-2021-38685","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"A command injection vulnerability has been reported to affect QNAP device, VioStor. If exploited, this vulnerability allows remote attackers to run arbitrary commands. We have already fixed this vulnerability in the following versions of QVR: QVR FW 5.1.6 build 20211109 and later","dates":{"published":"2021-11-26T14:00:13.130Z","modified":"2024-09-17T02:46:41.057Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":9.8,"severity":"critical","version":"3.1","versionLabel":"v3.1","source":"CVE.org","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":9.8,"severity":"critical","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":9.8,"severity":"critical","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","exploitability":null,"impact":null,"computed":false},{"version":"2.0","versionLabel":"v2.0","source":"NVD","score":7.5,"severity":"high","vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.01471,"percentile":0.73409,"severity":"low","asOf":"2026-10-20T00:00:00.000Z","change":{"pp":0,"baselineDate":"2026-09-20T00:00:00.000Z","baselineScore":0.01471},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.01471,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.01471,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.01471,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.01471,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.01471,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.01471,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.01471,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.01471,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.01471,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.01471,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.01471,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.01471,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.01471,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.01471,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.01471,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.01471,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.01471,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.01471,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.01471,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.01471,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.01471,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.01471,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.01471,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.01471,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.01471,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.01471,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.01471,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.01471,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.01471,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.01471,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.01471,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.01471,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.01471,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.01471,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.01471,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.01471,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.01471,"percentile":0.73409}],"last30":[{"date":"2026-09-20T00:00:00.000Z","score":0.01471,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.01471,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.01471,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.01471,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.01471,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.01471,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.01471,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.01471,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.01471,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.01471,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.01471,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.01471,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.01471,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.01471,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.01471,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.01471,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.01471,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.01471,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.01471,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.01471,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.01471,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.01471,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.01471,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.01471,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.01471,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.01471,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.01471,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.01471,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.01471,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.01471,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.01471,"percentile":0.73409}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[{"id":"CWE-78","name":"Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')","description":"The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.","type":"weakness","status":"Stable","abstraction":"Base","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/78.html"}],"affected":[{"vendor":"qnap systems inc.","product":"qvr","name":"QVR","label":"qvr","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ unspecified, < QVR FW 5.1.6 build 20211109","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ unspecified, < QVR FW 5.1.6 build 20211109","eol":null,"hubHref":"/vendor/qnap_systems_inc/qvr"},{"vendor":"qnap","product":"qvr","name":"qvr","label":"qvr","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"< 5.1.6","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 5.1.6","eol":null,"hubHref":"/vendor/qnap/qvr"}],"affectedCount":2,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://www.qnap.com/en/security-advisory/qsa-21-51","label":"www.qnap.com/en/security-advisory/qsa-21-51","hostname":"www.qnap.com","tags":["X Refsource MISC","Vendor Advisory"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2021-11-26T14:00:13.130Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2024-09-17T02:46:41.057Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":70,"level":"high","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-20T19:36:58.197Z","stale":false,"partial":false}}