CVE-2023-45028Network attack vector

Administrator-triggered denial of service via resource exhaustion

Published Feb 2, 2024 · Updated Aug 2, 2024

Uncontrolled resource consumption in QTS 5.1.x, QuTS hero h5.1.x, and QuTScloud c5.x allows remote authenticated users to cause a service interruption. QNAP has not disclosed the affected component, request type, or resource whose allocation lacks a limit or throttle. Administrator privileges and network access are required, and the documented consequence is denial of service rather than data disclosure or code execution.

CVSS severity5.5
Medium
EPSS probability0.44%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Uncontrolled resource consumption in QTS 5.1.x, QuTS hero h5.1.x, and QuTScloud c5.x allows remote authenticated users to cause a service interruption. QNAP has not disclosed the affected component, request type, or resource whose allocation lacks a limit or throttle. Administrator privileges and network access are required, and the documented consequence is denial of service rather than data disclosure or code execution.

The record

CVE
CVE-2023-45028
Published
Feb 2, 2024
Updated
Aug 2, 2024
Vendor
Linn Products Limited
Product
QuTS hero
Classifications
CWE-400, CWE-770, CAPEC-227, CAPEC-130, T1499
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Feb 2, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=h5.1.x <h5.1.5.2647 build 20240118

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Linn Products Limited · QuTS heroversion=h5.1.x <h5.1.5.2647 build 20240118
Linn Products Limited · QuTScloudversion=c5.x.x <c5.1.5.2651
Linn Products Limited · QTSversion=5.1.x <5.1.5.2645 build 20240116

Published CVSS scores

4.9NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
5.5QNAP Systems, Inc.CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:L/A:L

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)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
CWE-770Allocation of Resources Without Limits or Throttling
CAPEC-227Sustained Client Engagement
CAPEC-130Excessive Allocation
T1499Endpoint Denial of Service

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo