{"id":"CVE-2020-2509","kind":"vulnerability","aliases":["CVE-2020-2509"],"related":[],"title":"QNAP QNAP Network-Attached Storage (NAS): QNAP Network-Attached Storage (NAS) Command Injection Vulnerability","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","summary":"QNAP NAS devices contain a command injection flaw that lets an attacker run commands on the device. The sources describe it as remote code execution and say it is actively exploited in the wild.","severity":"critical","cvss":9.8,"epss":0.33987,"exploited":true,"exploited_at":"2022-04-11T00:00:00+00:00","products":[{"name":"QNAP QNAP Network-Attached Storage (NAS)","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["exploited","infrastructure","nas","qnap","self-hosted"],"not_affected_if":["non-qnap-hardware"],"how_to_check":null,"fix":"Apply the QNAP firmware update per vendor instructions, as CISA requires; the fixed version is unknown from the sources.","status":"open","published_at":"2021-04-17T04:15:11+00:00","first_seen_at":"2026-10-23T19:11:52+00:00","triaged_at":"2026-10-23T21:18:00+00:00","updated_at":"2026-10-23T21:57:35+00:00","category":"infrastructure","confidence":0.6,"triage":{"at":"2026-10-23T21:18:00Z","model":"claude-haiku-5-5","output":{"fix":"Apply the QNAP firmware update per vendor instructions, as CISA requires; the fixed version is unknown from the sources.","reach":"unknown","impact":"high","summary":"QNAP NAS devices contain a command injection flaw that lets an attacker run commands on the device. The sources describe it as remote code execution and say it is actively exploited in the wild.","category":"infrastructure","who_cares":["qnap","nas","self-hosted"],"confidence":0.6,"needs_auth":"unknown","worst_case":"Attacker runs arbitrary commands on the NAS, reading or altering stored data.","analyst_note":"Find the affected QNAP firmware versions, the fixed build, and the QNAP security advisory for CVE-2020-2509, plus whether the attack needs network access to the admin interface.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":["non-qnap-hardware"],"user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"critical"},"cost_usd":0.000463,"input_tokens":2848,"output_tokens":356,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-2020':18A,21A '-2509':19A,22A '20201119':148C '20201123':117C '20210202':111C '20210322':123C '20210324':129C '20210327':141C '20210416':135C '4.2.6':139C '4.3.3.1624':133C '4.3.4.1632':127C '4.3.6.1620':121C '4.5.1.1495':115C '4.5.2.1566':109C 'activ':66B 'affect':79C 'allow':88C 'alreadi':100C 'applic':97C 'arbitrari':92C 'attach':5A,11A 'attached':27A 'attack':48B,89C 'build':110C,116C,122C,128C,134C,140C,147C 'code':60B 'command':14A,42B,50B,72C,93C 'compromis':96C 'contain':40B 'cve':17A,20A 'describ':56B 'devic':39B,53B 'execut':61B,91C 'exploit':30B,67B,85C 'fix':101C 'flaw':44B 'follow':106C 'h4.5.1.1491':146C 'hero':83C,145C 'host':36B 'infrastructur':31B 'inject':15A,43B,73C 'later':113C,119C,125C,131C,137C,143C,150C 'let':46B 'nas':7A,13A,29A,32B,38B 'network':4A,10A,26A 'network-attach':3A,9A 'network-attached':25A 'qnap':1A,2A,8A,23A,24A,33B,37B 'qts':80C,108C,114C,120C,126C,132C,138C 'qut':82C,144C 'remot':59B 'report':77C 'run':49B 'say':63B 'self':35B 'self-host':34B 'sourc':55B 'storag':6A,12A 'storage':28A 'version':107C 'vulner':16A,74C,87C,103C 'wild':70B","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2021-04-17T04:15:11+00:00","kev":{"dateAdded":"2022-04-11","dueDate":"2022-05-02","requiredAction":"Apply updates per vendor instructions.","knownRansomwareCampaignUse":"Unknown"},"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cvss_by":"nvd@nist.gov","poc_count":0,"sources":[{"source":"kev","external_id":"CVE-2020-2509","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2020-2509","severity":null,"published_at":"2022-04-11T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:52+00:00","fetched_at":"2026-10-25T14:39:40+00:00","note":null},{"source":"epss","external_id":"CVE-2020-2509","url":"https://api.first.org/data/v1/epss?cve=CVE-2020-2509","severity":null,"published_at":null,"modified_at":null,"first_seen_at":"2026-10-23T19:13:44+00:00","fetched_at":"2026-10-23T19:13:44+00:00","note":null},{"source":"nvd","external_id":"CVE-2020-2509","url":"https://nvd.nist.gov/vuln/detail/CVE-2020-2509","severity":null,"published_at":"2021-04-17T04:15:11+00:00","modified_at":"2026-06-17T03:12:15+00:00","first_seen_at":"2026-10-23T21:57:35+00:00","fetched_at":"2026-10-23T21:57:35+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}