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QtsOperating system · Qnap

CVE-2024-48866

MEDIUM · 5.3 CVSS v3.1 Published 2024-12-06
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
62/100
Remediation priority · Elevated
Remotely reachable No privileges 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
An improper handling of URL encoding (Hex Encoding) vulnerability has been reported to affect several QNAP operating system versions. If exploited, the vulnerability could allow remote attackers to run the system into unexpected state. We have already fixed the vulnerability in the following versions: QTS 5.1.9.2954 build 20241120 and later QTS 5.2.2.2950 build 20241114 and later QuTS hero h5.1.9.2954 build 20241120 and later QuTS hero h5.2.2.2952 build 20241116 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 vulnerability exists in QNAP QTS and QuTS hero operating systems where URL-encoded (hex-encoded) input is not properly validated or handled. This improper handling could allow specially crafted URLs to cause the system to enter an unexpected state, potentially aiding further attacks or causing denial of service conditions.

MitigationAdministrators should upgrade to the fixed QTS or QuTS hero versions (QTS 5.1.9.2954+, 5.2.2.2950+ or QuTS hero h5.1.9.2954+, h5.2.2.2952+). For systems that cannot be immediately updated, consider deploying a WAF to filter malicious URL-encoded requests and restrict external access to the admin interface.

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:= 5.1.0.2348= 5.1.0.2399= 5.1.0.2418= 5.1.0.2444= 5.1.0.2466= 5.1.1.2491= 5.1.2.2533= 5.1.3.2578= 5.1.4.2596= 5.1.5.2645= 5.1.5.2679= 5.1.6.2722
Quts HeroOperating system
Affected:= h5.1.0.2409= h5.1.0.2424= h5.1.0.2453= h5.1.0.2466= h5.1.1.2488= h5.1.2.2534= h5.1.3.2578= h5.1.4.2596= h5.1.5.2647= h5.1.5.2680= h5.1.6.2734= h5.1.7.2770

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

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

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 operating system version
    Log into the QNAP admin web interface and navigate to Control Panel > System > System Information, or run the command `getsysinfo` via SSH to retrieve the firmware version
    Affected if The displayed version matches any of the affected QTS versions (5.1.0.2348, 5.1.0.2399, 5.1.0.2418, 5.1.0.2444, 5.1.0.2466, 5.1.1.2491, 5.1.2.2533, 5.1.3.2578, 5.1.4.2596, 5.1.5.2645, 5.1.5.2679, 5.1.6.2722) or QuTS hero versions (h5.1.0.2409, h5.1.0.2424, h5.1.0.2453, h5.1.0.2466, h5.1.1.2488, h5.1
  2. Confirm the product type (QTS or QuTS hero)
    Check the System Information page or run `getsysinfo` - QTS will show a version like 5.1.x while QuTS hero shows h5.1.x with the 'h' prefix
    Affected if The product is confirmed as QTS or QuTS hero and the version falls within the affected ranges listed above
  3. Determine if the web administration interface is exposed
    Review your network configuration to check if the QNAP admin web interface (ports 8080 or 443) is accessible from external networks or untrusted interfaces
    Affected if The admin interface is accessible from the internet or untrusted networks, increasing the likelihood of exploitation attempts

You are affected if your QNAP device runs QTS or QuTS hero with a version number matching any of the specific versions listed in the affected product ranges, and the web interface is network-accessible.

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

Administrators should upgrade to the fixed QTS or QuTS hero versions (QTS 5.1.9.2954+, 5.2.2.2950+ or QuTS hero h5.1.9.2954+, h5.2.2.2952+). For systems that cannot be immediately updated, consider deploying a WAF to filter malicious URL-encoded requests and restrict external access to the admin interface.

Recommended fix High confidence

QTS 5.1.9.2954 (build 20241120) or later for QTS 5.1.x; QTS 5.2.2.2950 (build 20241114) or later for QTS 5.2.x; QuTS hero h5.1.9.2954 (build 20241120) or later for h5.1.x; QuTS hero h5.2.2.2952 (build 20241116) or later for h5.2.x

  1. 1. Identify the current QTS or QuTS hero version by accessing the QNAP admin interface
  2. 2. Determine if the current version matches one of the affected versions: QTS 5.1.0.2348, 5.1.0.2399, 5.1.0.2418, or 5.1.0.2444; QuTS hero h5.1.0.2409, h5.1.0.2424, h5.1.0.2453, or h5.1.0.2466
  3. 3. If running QTS 5.1.x, upgrade to QTS 5.1.9.2954 build 20241120 or later
  4. 4. If running QTS 5.2.x, upgrade to QTS 5.2.2.2950 build 20241114 or later
  5. 5. If running QuTS hero h5.1.x, upgrade to h5.1.9.2954 build 20241120 or later
  6. 6. If running QuTS hero h5.2.x, upgrade to h5.2.2.2952 build 20241116 or later
  7. 7. Use QNAP's firmware update feature or download the firmware from the official QNAP download center
  8. 8. After upgrade, verify the system is running a fixed version and is functioning normally
Caveat Standard QNAP firmware upgrade precautions apply: backup critical data, ensure stable power, and review release notes for any known issues

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

Fix this in Qts Scoped from the published advisory
  • Consultation4.0 h
  • Implementation2.0 h
  • Testing3.0 h
  • Review / QA2.0 h
11.0 hours of engineering $1,970
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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-2024-48866 in production — separate from our analysis above.

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