How severe is CVE-2023-47565?

CVE-2023-47565 has a CVSS score of 8/10, rated HIGH. Immediate patching is strongly recommended.

Which products are affected by CVE-2023-47565?

Affected package information for CVE-2023-47565 is not yet fully mapped. Check the official advisory links for details.

How do I patch CVE-2023-47565?

Apply the qnap qvr firmware security patch or hotfix for CVE-2023-47565 on the affected version, following the vendor advisory for your exact build.

How do I detect CVE-2023-47565 across my infrastructure?

Inventory every qnap qvr firmware deployment and check each version against the affected-products list above. Because the exploit targets the running system rather than your application code, also watch for remote code execution at the network and runtime layer — O3 flags the exploit behaviour from runtime telemetry and egress traffic even before a vulnerable build is confirmed.

How do I mitigate CVE-2023-47565 if there is no patch (or I can't update yet)?

Cut exposure now: restrict the management/admin interface to trusted networks, segment the device, and apply the vendor's recommended configuration mitigations and any WAF/IPS signature. O3's runtime protection blocks the exploit chain at execution, holding the line on unpatched or end-of-life systems until you can patch.

How does O3 Security protect against CVE-2023-47565?

O3 detects and blocks CVE-2023-47565 exploitation at runtime: eBPF exploit-chain detection, plus L7 egress monitoring that catches the post-exploitation callback and severs the attacker's outbound channel.

Is CVE-2023-47565 actively exploited in the wild?

Yes. There are 2 known exploit references for CVE-2023-47565, including 2 in-the-wild exploitations observed on GitHub and other sources. Treat this as actively exploitable and prioritize patching immediately. All exploit code should only be run in an isolated sandbox environment for research or authorized testing — never against production systems without explicit written authorization.

What is the EPSS score for CVE-2023-47565?

CVE-2023-47565 has an EPSS (Exploit Prediction Scoring System) score of 73.3%, placing it in the 99th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. A score above 50% indicates significantly elevated exploitation risk — immediate patching is strongly recommended.

Is CVE-2023-47565 in the CISA Known Exploited Vulnerabilities catalog?

Yes. CVE-2023-47565 (QNAP VioStor NVR OS Command Injection Vulnerability) was added to CISA's Known Exploited Vulnerabilities (KEV) catalog on 2023-12-21. CISA required all US federal civilian agencies to remediate this vulnerability by 2024-01-11. The required action was: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. Being listed in the KEV catalog is the strongest possible confirmation of active exploitation — treat this as a critical priority.

What type of vulnerability is CVE-2023-47565?

CVE-2023-47565 is classified as OS Command Injection (CWE-78). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation. This is a high-impact weakness class that often enables remote code execution or data exposure.

Which products and versions are affected by CVE-2023-47565?

CVE-2023-47565 affects qnap qvr firmware. Check the affected-products list on this page against your deployed version to confirm exposure.

When was CVE-2023-47565 published, and has it been updated?

CVE-2023-47565 was published on December 8, 2023 and was last updated on June 17, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

CISA KEV·Added 2023-12-21 — agencies required to remediate by 2024-01-11

CVE-2023-47565

HIGH

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…

Published

Dec 8, 2023

Updated

Jun 17, 2026

Affected

0 pkgs

Patched

None yet

Exploits

2 known

EPSS Exploitation Probability

via FIRST.org ↗

73.3%probability of exploitation in next 30 days

Very High Risk99th percentile0.00%

EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.

Description

We have already fixed the vulnerability in the following versions:

QVR Firmware 5.0.0 and later

Affected Products

1 product · 1 configurations

qvr firmwareqnap

≥ 4.0.0 && < 5.0.0

range

Exploits & PoCs

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

An OS command injection vulnerability has been found to affect legacy QN…

bleepingcomputer.comAPIDec 2023

An OS command injection vulnerability has been found to affect legacy QN…

cisa.govCISADec 2023

Detection & mitigation playbook

Vendor / appliance

Detect
Inventory every qnap qvr firmware deployment and check each version against the affected-products list above. Because the exploit targets the running system rather than your application code, also watch for remote code execution at the network and runtime layer — O3 flags the exploit behaviour from runtime telemetry and egress traffic even before a vulnerable build is confirmed.
Fix
Apply the qnap qvr firmware security patch or hotfix for CVE-2023-47565 on the affected version, following the vendor advisory for your exact build.
Workarounds
Cut exposure now: restrict the management/admin interface to trusted networks, segment the device, and apply the vendor's recommended configuration mitigations and any WAF/IPS signature. O3's runtime protection blocks the exploit chain at execution, holding the line on unpatched or end-of-life systems until you can patch.
How O3 protects you
O3 detects and blocks CVE-2023-47565 exploitation at runtime: eBPF exploit-chain detection, plus L7 egress monitoring that catches the post-exploitation callback and severs the attacker's outbound channel.

Tailored to CVE-2023-47565. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.

Frequently Asked Questions

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

O3 Security · Runtime Protection

Is CVE-2023-47565 being exploited in your environment?

O3's eBPF runtime sensors and L7 egress monitoring detect and block the CVE-2023-47565 exploit chain at execution — protecting unpatched and end-of-life systems until the vendor patch is applied.

Protect my workloads How runtime protection works