CVE-2023-47565
QNAP VioStor NVR OS Command Injection Vulnerability
QNAP VioStor NVR
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. We have already fixed the vulnerability in the following versions: QVR Firmware 5.0.0 and later
Exploitation status
CISA Known Exploited Vulnerabilities
Listed by CISA on 21 December 2023. US federal agencies were required to remediate it by 11 January 2024.
EPSS — exploitation probability
FIRST puts the probability of exploitation activity in the next 30 days at 73.3%, which is higher than 99.5% of all scored vulnerabilities. EPSS is a forecast of activity, not a measure of severity, and it is rescored daily.
CVSS vector
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Frequently asked questions
Is CVE-2023-47565 being exploited by ransomware groups?
No ransomware group in this database is currently recorded as exploiting CVE-2023-47565.
What does CVE-2023-47565 affect?
CVE-2023-47565 affects QNAP VioStor NVR. 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. We have already fixed the vulnerability in the following versions: QVR Firmware 5.0.0 and later
How severe is CVE-2023-47565?
CVE-2023-47565 is rated HIGH with a CVSS base score of 8. EPSS puts the probability of exploitation in the next 30 days at 73.3%, higher than 99.5% of all scored vulnerabilities. It is listed in the CISA Known Exploited Vulnerabilities catalog, with a federal remediation deadline of 11 January 2024.
How should organisations respond to CVE-2023-47565?
Apply the vendor patch for QNAP VioStor NVR as the first priority, and treat any internet-facing instance as the most urgent. Because this vulnerability is associated with ransomware activity, also review whether the affected systems were reachable before patching, rather than assuming that patching alone closes the incident.