{"id":"CVE-2018-19949","kind":"vulnerability","aliases":["CVE-2018-19949"],"related":[],"title":"QNAP Network Attached Storage (NAS): QNAP NAS File Station Command Injection Vulnerability","description":"If exploited, this command injection vulnerability could allow remote attackers to run arbitrary commands. QNAP has already fixed the issue in the following QTS versions. QTS 4.4.2.1231 on build 20200302; QTS 4.4.1.1201 on build 20200130; QTS 4.3.6.1218 on build 20200214; QTS 4.3.4.1190 on build 20200107; QTS 4.3.3.1161 on build 20200109; QTS 4.2.6 on build 20200109.","summary":"QNAP NAS File Station has a command injection flaw that lets remote attackers run commands on the device. The flaw is listed in CISA's Known Exploited Vulnerabilities catalog, so attacks have been observed in the wild.","severity":"critical","cvss":9.8,"epss":0.3016,"exploited":true,"exploited_at":"2022-05-24T00:00:00+00:00","products":[{"name":"QNAP Network Attached Storage (NAS)","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["exploited","file-station","infrastructure","nas","qnap","ransomware","self-hosted"],"not_affected_if":["default-config"],"how_to_check":"Check the QNAP firmware version under Control Panel > System > Firmware Update and compare it with the QNAP advisory for CVE-2018-19949.","fix":"Apply the QNAP firmware update that fixes CVE-2018-19949, per vendor instructions; the fixed version is not named in the sources.","status":"open","published_at":"2020-10-28T18:15:12+00:00","first_seen_at":"2026-10-23T19:11:52+00:00","triaged_at":"2026-10-23T21:15:47+00:00","updated_at":"2026-10-23T21:57:35+00:00","category":"infrastructure","confidence":0.7,"triage":{"at":"2026-10-23T21:15:47Z","model":"claude-haiku-5-5","output":{"fix":"Apply the QNAP firmware update that fixes CVE-2018-19949, per vendor instructions; the fixed version is not named in the sources.\nunknown","reach":"internet","impact":"high","summary":"QNAP NAS File Station has a command injection flaw that lets remote attackers run commands on the device. The flaw is listed in CISA's Known Exploited Vulnerabilities catalog, so attacks have been observed in the wild.","category":"infrastructure","who_cares":["qnap","nas","file-station","self-hosted"],"confidence":0.7,"needs_auth":"unknown","worst_case":"Remote attacker runs arbitrary commands on the NAS as an unauthenticated user","analyst_note":"Find the QNAP advisory for CVE-2018-19949 to get affected and fixed firmware versions and whether authentication is required; check the KEV entry for ransomware use.","how_to_check":"Check the QNAP firmware version under Control Panel > System > Firmware Update and compare it with the QNAP advisory for CVE-2018-19949.\nunknown","needs_analyst":true,"not_affected_if":["default-config"],"user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000499,"input_tokens":2834,"output_tokens":431,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-19949':15A,18A '-2018':14A,17A '20200107':116C '20200109':121C,126C '20200130':106C '20200214':111C '20200302':101C '4.2.6':123C '4.3.3.1161':118C '4.3.4.1190':113C '4.3.6.1218':108C '4.4.1.1201':103C '4.4.2.1231':98C 'allow':79C 'alreadi':88C 'arbitrari':84C 'attach':3A 'attached':21A 'attack':47B,65B,81C 'build':100C,105C,110C,115C,120C,125C 'catalog':63B 'cisa':58B 'command':10A,41B,49B,75C,85C 'could':78C 'cve':13A,16A 'devic':52B 'exploit':24B,61B,73C 'file':8A,26B,37B 'file-st':25B 'fix':89C 'flaw':43B,54B 'follow':94C 'host':34B 'infrastructur':28B 'inject':11A,42B,76C 'issu':91C 'known':60B 'let':45B 'list':56B 'nas':5A,7A,23A,29B,36B 'network':2A,20A 'observ':68B 'qnap':1A,6A,19A,30B,35B,86C 'qts':95C,97C,102C,107C,112C,117C,122C 'ransomwar':31B 'remot':46B,80C 'run':48B,83C 'self':33B 'self-host':32B 'station':9A,27B,38B 'storag':4A 'storage':22A 'version':96C 'vulner':12A,62B,77C 'wild':71B","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2020-10-28T18:15:12+00:00","kev":{"dateAdded":"2022-05-24","dueDate":"2022-06-14","requiredAction":"Apply updates per vendor instructions.","knownRansomwareCampaignUse":"Known"},"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-2018-19949","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2018-19949","severity":null,"published_at":"2022-05-24T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:52+00:00","fetched_at":"2026-10-25T13:39:31+00:00","note":null},{"source":"epss","external_id":"CVE-2018-19949","url":"https://api.first.org/data/v1/epss?cve=CVE-2018-19949","severity":null,"published_at":null,"modified_at":null,"first_seen_at":"2026-10-23T19:13:45+00:00","fetched_at":"2026-10-23T19:13:45+00:00","note":null},{"source":"nvd","external_id":"CVE-2018-19949","url":"https://nvd.nist.gov/vuln/detail/CVE-2018-19949","severity":null,"published_at":"2020-10-28T18:15:12+00:00","modified_at":"2026-10-02T04:17:58+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"}