CVE-2023-23370

Administrator access to user accounts and sensitive data

Published Oct 6, 2023 · Updated Sep 19, 2024

Insufficiently protected credentials in QNAP QVPN Device Client 2.1.x allow local administrators to access user accounts and sensitive data. QNAP has not disclosed which credential store or code path fails to protect account data, and the public record identifies only unspecified vectors. Exploitation requires local authenticated administrator privileges and exposes account access and user-sensitive data without reported service disruption.

CVSS severity6.7
Medium
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Insufficiently protected credentials in QNAP QVPN Device Client 2.1.x allow local administrators to access user accounts and sensitive data. QNAP has not disclosed which credential store or code path fails to protect account data, and the public record identifies only unspecified vectors. Exploitation requires local authenticated administrator privileges and exposes account access and user-sensitive data without reported service disruption.

The record

CVE
CVE-2023-23370
Published
Oct 6, 2023
Updated
Sep 19, 2024
Vendor
Linn Products Limited
Product
QVPN Device Client
Classifications
CWE-522
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Oct 6, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 19, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2.1.x <2.1.0.0518

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

Linn Products Limited · QVPN Device Clientversion=2.1.x <2.1.0.0518

Published CVSS scores

6.7QNAP Systems Inc.CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:L/A:N
4.4NIST NVDCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-522Insufficiently Protected Credentials

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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