What is CVE-2023-23371?

CVE-2023-23371 is a medium-severity vulnerability in QNAP Qvpn, classified under Missing Encryption of Sensitive Data. CVSS score: 5.2/10. Published 2023-10-06.

How severe is CVE-2023-23371?

Medium severity. CVSS v3 base score is 5.2 out of 10.

Vulnerability in QNAP Qvpn

CVE-2023-23371

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 version: QVPN Windows 2.2.0.0823 and later

Published 2023-10-06 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.2 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:L.

EPSS exploit prediction

EPSS: 0.001 (1.0th percentile), scored 2026-09-27.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 1st percentile — 1.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: 0.000

Affected products

QNAP Qvpn
QNAP Systems Inc. Qvpn Windows — versions 2.2.x

Weakness classification (CWE)

References

www.qnap.com/en/security-advisory/qsa-23-39 (Vendor Advisory)

Frequently asked questions

What is CVE-2023-23371?: CVE-2023-23371 is a medium-severity vulnerability in QNAP Qvpn, classified under Missing Encryption of Sensitive Data. CVSS score: 5.2/10. Published 2023-10-06.
How severe is CVE-2023-23371?: Medium severity. CVSS v3 base score is 5.2 out of 10.