{"id":"CVE-2023-47565","aliases":["EUVD-2023-51676","GHSA-vj55-4r38-w2gh"],"status":"published","title":"Legacy VioStor NVR","description":"An OS command injection vulnerability has been found to affect legacy QNAP VioStor NVR models running QVR Firmware 4.x. If exploited, the vulnerability could allow authenticated users to execute commands via a network.\n\nWe have already fixed the vulnerability in the following versions:\n\nQVR Firmware 5.0.0 and later","severity":{"version":"3.1","score":8,"vector":"CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.73277,"percentile":0.99463,"model":"v2026.06.15"},"facts":{"in_kev":true,"known_exploited":true,"public_exploit":false,"fix_available":false},"cwes":["CWE-78"],"published":"2023-12-08T16:06:29Z","modified":"2026-06-17T06:32:55Z","kev":{"date_added":"2023-12-21","due_date":"2024-01-11","required_action":"Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.","known_ransomware_use":"Unknown"},"exploitation":[{"source":"euvd","since":"2023-12-21"},{"source":"kev","since":"2023-12-21"}],"products":[{"vendor":"qnap","product":"qvr_firmware"},{"vendor":"qnap","product":"viostor nvr"},{"vendor":"qnap systems inc.","product":"viostor nvr"}],"references":[{"url":"https://www.qnap.com/en/security-advisory/qsa-23-48","tags":["x_transferred","Vendor Advisory"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-47565","tags":["government-resource","US Government Resource"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-47565"},{"url":"https://github.com/advisories/GHSA-vj55-4r38-w2gh"}],"sources":{"cve":[{"id":"CVE-2023-47565","title":"Legacy VioStor NVR","description":"An OS command injection vulnerability has been found to affect legacy QNAP VioStor NVR models running QVR Firmware 4.x. If exploited, the vulnerability could allow authenticated users to execute commands via a network.\n\nWe have already fixed the vulnerability in the following versions:\n\nQVR Firmware 5.0.0 and later","status":"published","published":"2023-12-08T16:06:29.861Z","modified":"2025-10-21T23:05:29.811Z","cvss":[{"version":"3.1","score":8,"vector":"CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-78"],"updated_at":"2026-11-02T14:35:14.298866Z"}],"euvd":[{"id":"EUVD-2023-51676","description":"An OS command injection vulnerability has been found to affect legacy QNAP VioStor NVR models running QVR Firmware 4.x. If exploited, the vulnerability could allow authenticated users to execute commands via a network.\n\nWe have already fixed the vulnerability in the following versions:\n\nQVR Firmware 5.0.0 and later","status":"published","published":"2023-12-08T16:06:29Z","modified":"2025-10-21T23:05:29Z","cvss":[{"version":"3.1","score":8,"vector":"CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"exploited_since":"2023-12-21","updated_at":"2026-11-02T20:31:27.312976Z"}],"ghsa":[{"id":"GHSA-vj55-4r38-w2gh","title":"An OS command injection vulnerability has been found to affect legacy QNAP VioStor NVR models...","description":"An OS command injection vulnerability has been found to affect legacy QNAP VioStor NVR models running QVR Firmware 4.x. If exploited, the vulnerability could allow authenticated users to execute commands via a network.\n\nWe have already fixed the vulnerability in the following versions:\n\nQVR Firmware 5.0.0 and later","status":"published","published":"2023-12-08T18:30:42Z","modified":"2025-10-22T00:34:00Z","cvss":[{"version":"3.1","score":8,"vector":"CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-78"],"updated_at":"2026-11-02T15:04:08.734574Z"}],"kev":[{"id":"CVE-2023-47565","title":"QNAP VioStor NVR OS Command Injection Vulnerability","description":"QNAP VioStar NVR contains an OS command injection vulnerability that allows authenticated users to execute commands via a network.","cwes":["CWE-78"],"kev":{"date_added":"2023-12-21","due_date":"2024-01-11","required_action":"Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.","known_ransomware_use":"Unknown"},"updated_at":"2026-11-02T17:00:16.234141Z"}],"nvd":[{"id":"CVE-2023-47565","description":"An OS command injection vulnerability has been found to affect legacy QNAP VioStor NVR models running QVR Firmware 4.x. If exploited, the vulnerability could allow authenticated users to execute commands via a network.\n\nWe have already fixed the vulnerability in the following versions:\n\nQVR Firmware 5.0.0 and later","status":"published","published":"2023-12-08T16:15:16.367Z","modified":"2026-06-17T06:32:55.23Z","cvss":[{"version":"3.1","score":8,"vector":"CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","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"}],"cwes":["CWE-78"],"updated_at":"2026-11-02T14:08:54.010507Z"}]}}