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CVE-2023-47565

Legacy VioStor NVR

HIGH
8.8
CVSS Score
Published: December 8, 2023 at 04:06 PM UTC
Updated: June 17, 2026 at 06:32 AM UTC
2 products affected across 1 vendorQvr FirmwareQVR

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Severity
HIGH8.8
Exploitation
CISA KEV
Exploit prediction
EPSS 73%
SSVC
Active

Actively Exploited

CISA Known Exploited Vulnerabilities (KEV) Catalog

EPSS Score73.3%

EPSS (Exploit Prediction Scoring System) estimates a 73.3% chance this CVE is exploited in the wild within the next 30 days — higher than 99% of all CVEs. It complements CVSS: a high EPSS on a mid-severity CVE can still be urgent.

QNAP VioStar NVR contains an OS command injection vulnerability that allows authenticated users to execute commands via a network.

Required Action
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Ransomware Use
Unknown
Added to KEV
Dec 21, 2023
Remediation Due
Jan 11, 2024
1022 days overdue
Notes
https://www.qnap.com/en/security-advisory/qsa-23-48
https://nvd.nist.gov/vuln/detail/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. We have already fixed the vulnerability in the following versions: QVR Firmware 5.0.0 and later

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Qvr Firmware· Qnap
95%
4.0.0 ≤ v < 5.0.0
Affected range stops below 5.0.0, so it looks safe — our inference, not a vendor statement
QVR· Qnap
60%
4.x ≤ v < 5.0.04.x
Affected range stops below 5.0.0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

Vendor Advisory
Source: [email protected]
https://www.qnap.com/en/security-advisory/qsa-23-48
US Government Resource
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-47565

SSVC — Action Prioritization

SSVCActiveNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.8HIGH[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-78

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