CVE-2023-34972

Sensitive-data disclosure via undisclosed cleartext transmission

Published Aug 24, 2023 · Updated Sep 30, 2024

Cleartext transmission in QTS 5.0 and 5.1 and QuTS hero h5.1 allows attackers on local networks to read sensitive data via unspecified vectors. QNAP has not identified the affected component, communication channel, transmitted data, or operation that leaves it unencrypted. Exploitation requires local-network access and user interaction according to the CNA assessment; the reported consequence is limited to reading sensitive data.

CVSS severity3.5
Low
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cleartext transmission in QTS 5.0 and 5.1 and QuTS hero h5.1 allows attackers on local networks to read sensitive data via unspecified vectors. QNAP has not identified the affected component, communication channel, transmitted data, or operation that leaves it unencrypted. Exploitation requires local-network access and user interaction according to the CNA assessment; the reported consequence is limited to reading sensitive data.

The record

CVE
CVE-2023-34972
Published
Aug 24, 2023
Updated
Sep 30, 2024
Vendor
Linn Products Limited
Product
QuTS hero
Classifications
CWE-319, CAPEC-102, T1040
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 24, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 30, 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=h5.1.* <h5.1.0.2424 build 20230609

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Linn Products Limited · QuTS heroversion=h5.1.* <h5.1.0.2424 build 20230609
Linn Products Limited · QTSversion=5.0.* <5.0.1.2425 build 20230609; version=5.1.* <5.1.0.2444 build 20230629

Published CVSS scores

6.5NIST NVDCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
3.5QNAP Systems, Inc.CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:L/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-319Cleartext Transmission of Sensitive Information
CAPEC-102Session Sidejacking
T1040Network Sniffing

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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