CVE-2023-34973Network attack vector

Secret prediction via insufficient entropy

Published Aug 24, 2023 · Updated Sep 30, 2024

Insufficient entropy in QNAP QTS 5.0.1 and 5.1.0 and QuTS hero h5.1.0 allows remote attackers to predict secrets. QNAP has not disclosed the affected component, the secret involved, or how attacker-controlled input reaches the entropy source. Network reachability and user interaction are required under QNAP's assessment, and the reported consequence is limited to secret prediction.

CVSS severity3.1
Low
EPSS probability0.48%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Insufficient entropy in QNAP QTS 5.0.1 and 5.1.0 and QuTS hero h5.1.0 allows remote attackers to predict secrets. QNAP has not disclosed the affected component, the secret involved, or how attacker-controlled input reaches the entropy source. Network reachability and user interaction are required under QNAP's assessment, and the reported consequence is limited to secret prediction.

The record

CVE
CVE-2023-34973
Published
Aug 24, 2023
Updated
Sep 30, 2024
Vendor
Linn Products Limited
Product
QuTS hero
Classifications
CWE-331
Attack vector
network
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 vectornetwork
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

5.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
3.1QNAP Systems, Inc.CVSS:3.1/AV:N/AC:H/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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-331Insufficient Entropy

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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