CVE-2023-23371
Qnap Qvpn 2.2.0 – 2.2.0.0823
Raw vector
CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:LCVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.
Summary
CVE-2023-23371 is a medium-severity Missing Encryption of Sensitive Data (CWE-311) vulnerability in Qnap Qvpn. Its CVSS base score is 5.2 (Medium).
Operationally, exploitation aligns with the MITRE ATT&CK technique Network Sniffing (T1040); ranked at the 1th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
OWASP Top 10 for Web (2025)
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2023-27471
Vulnerability Data
A cleartext transmission of sensitive information vulnerability has been reported to affect QVPN Device Client. If exploited, the vulnerability could allow local authenticated administrators to read sensitive data via unspecified vectors. We have already fixed the vulnerability in the following…
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version: QVPN Windows 2.2.0.0823 and later
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise Techniques
CVEs Like This One
Affected Assets
Mitigating Controls
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.
Privacy and security training stresses encryption of sensitive data, reducing missing encryption weaknesses.
Exchange agreements must document security requirements, which would include encryption to protect sensitive data in transit.
The map highlights data actions that involve sensitive data, enabling identification of missing encryption requirements.
Settings can require encryption of sensitive data, preventing missing encryption weaknesses.
Requires encryption and similar controls for CUI processed or stored externally, preventing missing encryption of sensitive data.
Privacy and security requirements placed on external providers, together with monitoring, tangibly reduce missing encryption of sensitive data processed or stored by those services.
Mandates encryption for specified data uses, directly preventing missing encryption of sensitive information.
Policy addresses secure transport and handling of media to avoid cleartext transmission of sensitive information.
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.
Encryption of data-in-transit directly prevents cleartext transmission while the control also addresses integrity and availability.
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.
Explicit rules requiring encryption for sensitive information in transit eliminate the weakness of sending data without cryptographic protection.
Hardening callouts derived
DISA STIG baselines are authored against specific weaknesses. Where this CVE cites a broad weakness class, the mapping is not asserted at that abstraction (owner ruling, 2026-09-25: grade only at Base and below), so no rule is shown here rather than a rule shown against the wrong grain.
- No fine-grained STIG row for CWE-311, a class-level weakness. Rules are authored against its narrower children: CWE-312.