{"cve":{"cve_id":"CVE-2020-2509","is_kev":true,"kev_date_added":"2022-04-11","kev_vendor_project":"QNAP","kev_product":"QNAP Network-Attached Storage (NAS)","kev_vulnerability_name":"QNAP Network-Attached Storage (NAS) Command Injection Vulnerability","kev_short_description":"QNAP NAS devices contain a command injection vulnerability which could allow attackers to perform remote code execution.","kev_required_action":"Apply updates per vendor instructions.","kev_due_date":"2022-05-02","kev_known_ransomware":false,"kev_notes":"https://nvd.nist.gov/vuln/detail/CVE-2020-2509","kev_cwes":["CWE-77","CWE-78"],"epss_score":0.34168,"epss_percentile":0.98187,"epss_as_of":"2026-06-23","description":"A command injection vulnerability has been reported to affect QTS and QuTS hero. If exploited, this vulnerability allows attackers to execute arbitrary commands in a compromised application. We have already fixed this vulnerability in the following versions: QTS 4.5.2.1566 Build 20210202 and later QTS 4.5.1.1495 Build 20201123 and later QTS 4.3.6.1620 Build 20210322 and later QTS 4.3.4.1632 Build 20210324 and later QTS 4.3.3.1624 Build 20210416 and later QTS 4.2.6 Build 20210327 and later QuTS hero h4.5.1.1491 build 20201119 and later","published_at":"2021-04-17T03:50:12.655000Z","last_modified_at":null,"cvss_v3_score":9.8,"cvss_v3_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cvss_v3_severity":"CRITICAL","cvss_v4_score":null,"cvss_v4_vector":null,"cvss_v4_severity":null,"ssvc_decision":null,"ssvc_exploitation":"active","ssvc_automatable":true,"ssvc_technical_impact":"total","cwes":["CWE-77","CWE-78"],"nvd_references":["https://www.qnap.com/en/security-advisory/qsa-21-05"],"vuln_status":null,"trending_score":null,"is_trending":false,"has_trended":false,"trended_number_one":false,"trending_peak_score":null,"trending_peak_rank":null,"started_trending_at":null,"trended_number_one_at":null,"summary_generated":null,"summary_generated_at":null,"summary_model":null,"created_at":"2026-06-24T00:09:31.350578Z","updated_at":"2026-06-28T23:13:53.256646Z"},"effective_severity":"CRITICAL","badges":["kev"],"impact_analysis":[],"cvss_v3_decoded":{"version":"3.1","metrics":[{"metric":"AV","name":"Attack Vector","value":"N","value_label":"Network"},{"metric":"AC","name":"Attack Complexity","value":"L","value_label":"Low"},{"metric":"PR","name":"Privileges Required","value":"N","value_label":"None"},{"metric":"UI","name":"User Interaction","value":"N","value_label":"None"},{"metric":"S","name":"Scope","value":"U","value_label":"Unchanged"},{"metric":"C","name":"Confidentiality","value":"H","value_label":"High"},{"metric":"I","name":"Integrity","value":"H","value_label":"High"},{"metric":"A","name":"Availability","value":"H","value_label":"High"}]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"qnap-systems-inc.","vendor_name":"QNAP Systems Inc.","product_slug":"qts","product_name":"QTS","version_start":"unspecified","version_start_inclusive":true,"version_end":"4.5.2.1566 Build 20210202","version_end_inclusive":false,"cpe23_uri":"cve5:qnap-systems-inc.:qts:unspecified:4.5.2.1566 Build 20210202"},{"vendor_slug":"qnap-systems-inc.","vendor_name":"QNAP Systems Inc.","product_slug":"qts","product_name":"QTS","version_start":"unspecified","version_start_inclusive":true,"version_end":"4.5.1.1495 Build 20201123","version_end_inclusive":false,"cpe23_uri":"cve5:qnap-systems-inc.:qts:unspecified:4.5.1.1495 Build 20201123"},{"vendor_slug":"qnap-systems-inc.","vendor_name":"QNAP Systems Inc.","product_slug":"qts","product_name":"QTS","version_start":"unspecified","version_start_inclusive":true,"version_end":"4.3.6.1620 Build 20210322","version_end_inclusive":false,"cpe23_uri":"cve5:qnap-systems-inc.:qts:unspecified:4.3.6.1620 Build 20210322"},{"vendor_slug":"qnap-systems-inc.","vendor_name":"QNAP Systems Inc.","product_slug":"qts","product_name":"QTS","version_start":"unspecified","version_start_inclusive":true,"version_end":"4.3.4.1632 Build 20210324","version_end_inclusive":false,"cpe23_uri":"cve5:qnap-systems-inc.:qts:unspecified:4.3.4.1632 Build 20210324"},{"vendor_slug":"qnap-systems-inc.","vendor_name":"QNAP Systems Inc.","product_slug":"qts","product_name":"QTS","version_start":"unspecified","version_start_inclusive":true,"version_end":"4.3.3.1624 Build 20210416","version_end_inclusive":false,"cpe23_uri":"cve5:qnap-systems-inc.:qts:unspecified:4.3.3.1624 Build 20210416"},{"vendor_slug":"qnap-systems-inc.","vendor_name":"QNAP Systems Inc.","product_slug":"qts","product_name":"QTS","version_start":"unspecified","version_start_inclusive":true,"version_end":"4.2.6 Build 20210327","version_end_inclusive":false,"cpe23_uri":"cve5:qnap-systems-inc.:qts:unspecified:4.2.6 Build 20210327"},{"vendor_slug":"qnap-systems-inc.","vendor_name":"QNAP Systems Inc.","product_slug":"quts-hero","product_name":"QuTS hero","version_start":"unspecified","version_start_inclusive":true,"version_end":"h4.5.1.1491 build 20201119","version_end_inclusive":false,"cpe23_uri":"cve5:qnap-systems-inc.:quts-hero:unspecified:h4.5.1.1491 build 20201119"}],"exploit_refs":[],"news":[],"references":[{"url":"https://www.qnap.com/en/security-advisory/qsa-21-05","source_type":"MISC","tags":[]}],"timeline":[{"type":"published","at":"2021-04-17T03:50:12.655000Z","label":"CVE published","source":null},{"type":"cisa_reported","at":"2022-04-11T00:00:00Z","label":"Added to CISA KEV catalog","source":"kev"},{"type":"ssvc_changed","at":"2026-06-24T00:31:29.914509Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"ssvc_changed","at":"2026-06-24T00:31:29.914509Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"ssvc_changed","at":"2026-06-24T00:31:29.914509Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"cvss_changed","at":"2026-06-24T00:31:29.914509Z","label":"CVSS score revised","source":"vulnrichment"},{"type":"cvss_changed","at":"2026-06-24T00:31:29.914509Z","label":"CVSS score revised","source":"vulnrichment"},{"type":"cvss_changed","at":"2026-06-24T00:31:29.914509Z","label":"CVSS score revised","source":"vulnrichment"}]}