Cyber Resilience

CVE-2023-47565

Command Injection in Qnap Qvr Firmware 4.0.0 – 5.0.0

CISA KEVActive ExploitationEUVD ExploitedCommand Injection
Published
08 December 2023
Modified
26 February 2026
KEV Added
21 December 2023
Patch / advisory
View advisory
CVSS Score v3.1 8.0
Click a component to see what it means
Raw vectorCVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.73 99.4th percentile
Risk Priority 85 floored blend · peak EPSS

Summary

CVE-2023-47565 is a high-severity OS Command Injection (CWE-78) vulnerability in Qnap Qvr Firmware. Its CVSS base score is 8.0 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Command and Scripting Interpreter (T1059); ranked in the top 0.6% of CVEs by exploit likelihood; CISA has added it to the Known Exploited Vulnerabilities catalog.

Deeper analysis AI-assisted summary

Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.

An OS command injection vulnerability tracked as CVE-2023-47565 affects legacy QNAP VioStor NVR models running QVR Firmware 4.x. The flaw, assigned CWE-78, permits execution of arbitrary operating-system commands and carries a CVSS 3.1 score of 8.0 reflecting network-adjacent attack vector, low complexity, and low-privileged authenticated access that can fully compromise confidentiality, integrity, and availability.

An authenticated user on the same network segment can supply crafted input to trigger the injection, resulting in arbitrary command execution on the affected NVR appliance. Successful exploitation therefore allows an attacker to run commands with the privileges of the vulnerable process, potentially leading to full device takeover.

QNAP security advisory QSA-23-48 states that the issue has been resolved in QVR Firmware 5.0.0 and later releases; administrators are advised to upgrade affected legacy devices to a supported firmware branch. The vulnerability is also listed in the CISA Known Exploited Vulnerabilities catalog.

The associated EPSS score currently stands at 0.8675 with a recorded peak of 0.8808, indicating sustained exploitation interest after disclosure.

OWASP Top 10 for Web (2025)

A05:2025 Injection

EU & UK References

Vulnerability Data

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…

more

the following versions: QVR Firmware 5.0.0 and later

CWE(s)
CWE-78
KEV Date Added
21 December 2023

Related Threats

MITRE ATT&CK Enterprise Techniques

T1059 Command and Scripting Interpreter Execution
Adversaries may abuse command and script interpreters to execute commands, scripts, or binaries.
attack.mitre.org →
T1059.003 Windows Command Shell Execution
Adversaries may abuse the Windows command shell for execution.
attack.mitre.org →
T1059.004 Unix Shell Execution
Adversaries may abuse Unix shell commands and scripts for execution.
attack.mitre.org →
T1059.001 PowerShell Execution
Adversaries may abuse PowerShell commands and scripts for execution.
attack.mitre.org →
T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2023-39297Same product class: NAS / storage appliance
CVE-2017-6360Same product class: NAS / storage appliance
CVE-2023-23373Same product class: NAS / storage appliance
CVE-2023-39294Same product class: NAS / storage appliance
CVE-2023-32976Same product class: NAS / storage appliance
CVE-2024-21898Same product class: NAS / storage appliance
CVE-2026-24719Same product class: NAS / storage appliance
CVE-2025-47212Same product class: NAS / storage appliance
CVE-2025-66273Same product class: NAS / storage appliance
CVE-2023-23368Same product class: NAS / storage appliance

Affected Assets

qnap
qvr firmware
4.0.0 — 5.0.0

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)

—

Detect
Catch it (NIST detect / respond)

—

Harden
Shrink the surface (DISA STIG)

—

Validate
Prove the fix (OWASP ASVS)
  • V1.2.5
  • V1.2.8
  • V15.2.5

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

SC-27 Platform-independent Applications
addresses: CWE-78

Platform-independent apps typically execute inside a managed runtime or sandbox that restricts direct OS command execution, reducing the ability to exploit OS command injection.

SI-10 Information Input Validation
addresses: CWE-78

Validates inputs to block special elements that would alter OS command execution.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.PS-06 mostly match
prevents

PR.PS-06's SDLC practices directly require secure coding and input handling that blocks command-injection defects, yet the single broad outcome leaves many specific neutralization vectors and verification gaps unaddressed.

PR.PS-02 partial match
prevents

Routine patching/maintenance can remediate known command-injection CVEs in dependencies (partial forward) but does nothing to stop developers from introducing improper neutralization in custom code (none reverse).

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.8.29 Security testing in development and acceptance mostly match
finds

Security testing and code review target insecure use of operating-system command interfaces, catching command-injection flaws introduced during development.

References