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QtsOperating system · Qnap

CVE-2024-56805

MEDIUM · 5.4 CVSS v3.1 Published 2025-06-06
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
60/100
Remediation priority · Elevated
Remotely reachable Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
A buffer overflow vulnerability has been reported to affect several QNAP operating system versions. If exploited, the vulnerability could allow remote attackers who have gained user access to modify memory or crash processes. We have already fixed the vulnerability in the following versions: QTS 5.2.4.3079 build 20250321 and later QuTS hero h5.2.4.3079 build 20250321 and later

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · moderate confidence

A buffer overflow vulnerability in QNAP QTS and QuTS hero operating systems allows remote authenticated users to modify memory or crash processes. The vulnerability stems from insufficient bounds checking in a component accessible to users with valid credentials, potentially enabling memory corruption.

MitigationUpdate QNAP devices to QTS 5.2.4.3079 build 20250321 or QuTS hero h5.2.4.3079 build 20250321 or later to remediate this vulnerability.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
QtsOperating system
Affected:= 5.2.0.2737= 5.2.0.2744= 5.2.0.2782= 5.2.0.2802= 5.2.0.2823= 5.2.0.2851= 5.2.0.2860= 5.2.1.2930= 5.2.2.2950= 5.2.3.3006= 5.2.4.3070
Quts HeroOperating system
Affected:= h5.2.0.2737= h5.2.0.2782= h5.2.0.2789= h5.2.0.2802= h5.2.0.2823= h5.2.0.2851= h5.2.0.2860= h5.2.1.2929= h5.2.1.2940= h5.2.2.2952= h5.2.3.3006= h5.2.4.3070

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
Low

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Identify the QNAP product type
    Log into the QNAP device admin console and check the dashboard or System Information page to determine if the system is running QTS or QuTS hero. This is typically displayed on the main dashboard or in Control Panel > System > System Information.
    Affected if The device runs either QTS or QuTS hero operating system
  2. Check the installed QTS version
    Navigate to Control Panel > System > System Information > Firmware Version. Record the full version number and build (for example, 5.2.0.2737).
    Affected if The version matches any of these: 5.2.0.2737, 5.2.0.2744, 5.2.0.2782, 5.2.0.2802, 5.2.0.2823, 5.2.0.2851, 5.2.0.2860, 5.2.1.2930, 5.2.2.2950, 5.2.3.3006, or 5.2.4.3070
  3. Check the installed QuTS hero version
    Navigate to Control Panel > System > System Information > Firmware Version. Record the full version number and build (for example, h5.2.0.2737). The version will start with 'h5' for QuTS hero.
    Affected if The version matches any of these: h5.2.0.2737, h5.2.0.2782, h5.2.0.2789, h5.2.0.2802, h5.2.0.2823, h5.2.0.2851, h5.2.0.2860, h5.2.1.2929, h5.2.1.2940, h5.2.2.2952, h5.2.3.3006, or h5.2.4.3070
  4. Verify remote access configuration
    Check if the QNAP device has remote access services enabled that allow external authentication. Review Control Panel > System > General Settings > System Administration for remote access settings, and check if services like QNAP Cloud, VPN, or port forwarding expose the admin interface externally.
    Affected if Remote authenticated access to the device is possible from untrusted networks

A system is affected if it runs QTS or QuTS hero with a version number matching any of the specific builds listed in the affected versions, and the device is accessible to remote authenticated users.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Update QNAP devices to QTS 5.2.4.3079 build 20250321 or QuTS hero h5.2.4.3079 build 20250321 or later to remediate this vulnerability.

Recommended fix High confidence

QTS 5.2.4.3079 (build 20250321 or later) for QTS systems; QuTS hero h5.2.4.3079 (build 20250321 or later) for QuTS hero systems

  1. 1. Identify whether the device is running QTS or QuTS hero operating system
  2. 2. Check the current firmware version in the QNAP admin interface (System Settings > Firmware Update)
  3. 3. If running an affected QTS version (5.2.0.2737, 5.2.0.2744, 5.2.0.2782, or 5.2.0.2802), upgrade to QTS 5.2.4.3079 build 20250321 or later
  4. 4. If running an affected QuTS hero version (h5.2.0.2737, h5.2.0.2782, h5.2.0.2789, or h5.2.0.2802), upgrade to QuTS hero h5.2.4.3079 build 20250321 or later
  5. 5. Perform the firmware upgrade through the QNAP admin interface or manual upload of the firmware file
  6. 6. After upgrade, verify the new version is running and the vulnerability is patched
Caveat Standard QNAP firmware upgrade risks apply - ensure backups are current and power is stable during the update process

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Qts Scoped from the published advisory
  • Consultation1.0 h
  • Implementation2.0 h
  • Testing2.0 h
  • Review / QA1.0 h
6.0 hours of engineering $1,040
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2024-56805 in production — separate from our analysis above.

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What this is

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What belongs here
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  • Version or environment caveats, and links to real fixes
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