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.
We have already fixed the vulnerability in the following versions:
QVR Firmware 5.0.0 and later
problem types: CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
affected:
{
defaultStatus: unaffected
platforms: QVR Firmware
product: VioStor NVR
vendor: QNAP Systems Inc.
versions:
lessThan: 5.0.0 , status: affected, version: 4.x, versionType: custom
}
metrics:
cvssV3_1: [
attackComplexity: LOW
attackVector: ADJACENT_NETWORK
availabilityImpact: HIGH
baseScore: 8
baseSeverity: HIGH
confidentialityImpact: HIGH
integrityImpact: HIGH
privilegesRequired: LOW
scope: UNCHANGED
userInteraction: NONE
vectorString: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
version: 3.1
]
format: CVSS
scenarios: GENERAL
solutions: We have already fixed the vulnerability in the following versions:
QVR Firmware 5.0.0 and later
