Security readout for executives and security teams
Plain-English summary
This affects legacy QNAP VioStor NVR appliances running QVR Firmware 4.x. An authenticated user with network access could run operating-system commands on the device. Because CISA lists CVE-2023-47565 in KEV, organizations should treat exposed affected devices as already relevant to real-world attackers.
Executive priority
High priority. This is a high-impact command injection issue on surveillance infrastructure, and CISA KEV confirms real-world exploitation. Remediate affected legacy QNAP NVRs ahead of routine patch cycles.
Technical view
CVE-2023-47565 is a CWE-78 OS command injection flaw in QNAP VioStor NVR QVR Firmware 4.x. The CVSS 3.1 score is 8.0, with low complexity, low privileges, no user interaction, and high confidentiality, integrity, and availability impact. QNAP says QVR Firmware 5.0.0 and later fix the issue.
Likely exposure
Exposure is limited to legacy QNAP VioStor NVR models running QVR Firmware 4.x. The source bundle does not identify specific model numbers, default configurations, or whether unauthenticated internet exposure is common.
Exploitation context
Active exploitation is supported by CISA KEV listing. The available sources do not provide exploit details, campaign attribution, observed scale, or indicators of compromise.
Researcher notes
Do not assume all QNAP products are affected. The stated affected scope is legacy VioStor NVR running QVR Firmware 4.x. The available sources name the fixed major firmware line but do not provide exploit mechanics, affected model granularity, or alternate mitigations.
Mitigation direction
- Upgrade affected devices to QVR Firmware 5.0.0 or later.
- Check QNAP guidance for devices that cannot be upgraded.
- Prioritize remediation for all KEV-exposed QVR Firmware 4.x systems.
- Remove unsupported legacy NVRs from sensitive network paths where feasible.
Validation and detection
- Inventory QNAP VioStor NVR devices and firmware versions.
- Confirm no production device remains on QVR Firmware 4.x.
- Verify upgraded devices report QVR Firmware 5.0.0 or later.
- Review access logs for suspicious authenticated administrative activity.
- Track CISA KEV status in vulnerability management records.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-78: Command execution behavior lookup
Command injection weaknesses can lead defenders to review execution techniques and command interpreter telemetry. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2023-47565 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 8 (3.1)
- Known Exploited
- Yes
- Published
Vector: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CISA KEV status
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H2.15.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
8HighVector: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.qnap.com/en/security-advisory/qsa-23-48CVE reference
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-47565CVE reference · government-resource
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.