dbcve.org
QtsOperating system · Qnap

CVE-2024-50399

HIGH · 7.2 CVSS v3.1 Published 2024-11-22
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
78/100
Remediation priority · High
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 use of externally-controlled format string vulnerability has been reported to affect several QNAP operating system versions. If exploited, the vulnerability could allow remote attackers who have gained administrator access to obtain secret data or modify memory. We have already fixed the vulnerability in the following versions: QTS 5.2.1.2930 build 20241025 and later QuTS hero h5.2.1.2929 build 20241025 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

This is a format string vulnerability in QNAP QTS and QuTS hero operating systems where user-controlled input is used as a format string in a printf-style function, allowing memory manipulation or data exfiltration. The vulnerability requires the attacker to already have administrator-level access to the system, making it a privilege escalation or persistence mechanism rather than an initial access vector.

MitigationUpdate QNAP devices to QTS 5.2.1.2930 build 20241025 or QuTS hero h5.2.1.2929 build 20241025 or later. Since administrator access is required, ensure strong admin credential hygiene and restrict administrative access to trusted networks.

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
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

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
High
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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

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 firmware variant
    Access the device admin console or check system information to determine if the device runs QTS or QuTS hero. QTS is the standard QNAP firmware, QuTS hero is the ZFS-based version.
    Affected if The device runs either QTS or QuTS hero operating system
  2. Check the installed QTS version
    In the QTS admin console, go to Control Panel > System > Firmware Update > Check for Update, or use the command line: cat /etc/config/qpkg.conf to identify the firmware version, or check the System Information widget displaying the firmware build number.
    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
  3. Check the installed QuTS hero version
    In the QuTS hero admin console, go to Control Panel > System > Firmware Update > Check for Update, or use the command line to retrieve the firmware build number from system information.
    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
  4. Verify administrator access controls
    Review the list of admin users and confirm that administrative access is limited to trusted individuals. Check for any unauthorized administrator accounts or unusual administrative sessions.
    Affected if Multiple administrator accounts exist without documented authorization, or administrative access is not restricted to trusted networks

The system is vulnerable if it runs QTS version 5.2.0.2737, 5.2.0.2744, 5.2.0.2782, 5.2.0.2802, 5.2.0.2823, 5.2.0.2851, or 5.2.0.2860, or QuTS hero version h5.2.0.2737, h5.2.0.2782, h5.2.0.2789, h5.2.0.2802, h5.2.0.2823, h5.2.0.2851, or h5.2.0.2860.

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 5.2.1.2930 build 20241025 or QuTS hero h5.2.1.2929 build 20241025 or later. Since administrator access is required, ensure strong admin credential hygiene and restrict administrative access to trusted networks.

Recommended fix High confidence

QTS 5.2.1.2930 build 20241025 or later; QuTS hero h5.2.1.2929 build 20241025 or later

  1. 1. Identify the currently installed QTS or QuTS hero version via the control panel or system information page
  2. 2. Confirm the current version matches one of the affected versions: QTS 5.2.0.2737, 5.2.0.2744, 5.2.0.2782, 5.2.0.2802 or QuTS hero h5.2.0.2737, h5.2.0.2782, h5.2.0.2789, h5.2.0.2802
  3. 3. Perform a full backup of all critical data and system configurations
  4. 4. Navigate to the QNAP Control Panel > System > Firmware Update
  5. 5. Check for and install the latest available firmware version
  6. 6. Verify the upgrade was successful by confirming the new version is QTS 5.2.1.2930 build 20241025 or later, or QuTS hero h5.2.1.2929 build 20241025 or later
Caveat Standard firmware update risks apply - ensure power stability and backup data before upgrading

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

Fix this in Qts Scoped from the published advisory
  • Consultation2.0 h
  • Implementation2.0 h
  • Testing1.0 h
  • Review / QA1.0 h
6.0 hours of engineering $1,090
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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-2024-50399 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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