dbcve.org
Hybrid Backup SyncApplication · Qnap

CVE-2024-50388

CRITICAL · 9.8 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 →
100/100
Remediation priority · Urgent
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 OS command injection vulnerability has been reported to affect HBS 3 Hybrid Backup Sync. If exploited, the vulnerability could allow remote attackers to execute commands. We have already fixed the vulnerability in the following version: HBS 3 Hybrid Backup Sync 25.1.1.673 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

An OS command injection vulnerability exists in HBS 3 Hybrid Backup Sync that allows remote attackers to execute arbitrary operating system commands on the affected QNAP device. The critical severity (CVSS 9.8) suggests the vulnerability is exploitable over the network without authentication or with minimal privileges.

MitigationUpgrade HBS 3 Hybrid Backup Sync to version 25.1.1.673 or later. If immediate patching is not possible, restrict network exposure of the management interface and monitor for suspicious activity.

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
Hybrid Backup SyncApplication
Affected:= 25.1.0.627

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
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/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. Verify HBS 3 Hybrid Backup Sync is installed
    Access QNAP web interface, go to App Center, locate HBS 3 Hybrid Backup Sync in the installed applications list. Alternatively, run command: cat /etc/config/qpkg.conf | grep -i hybrid
    Affected if HBS 3 Hybrid Backup Sync does not appear in the installed applications list, then the system is not affected by this CVE.
  2. Check installed version of HBS 3
    In QNAP App Center, click on HBS 3 Hybrid Backup Sync and view the version number displayed. From CLI: cat /etc/config/qpkg.conf | grep -A5 HybridBackup
    Affected if The version shown is exactly 25.1.0.627, then the system is vulnerable to this CVE.
  3. Confirm version is not patched
    Compare your installed version against the affected range. Version 25.1.0.627 is the only affected version; version 25.1.1.673 and later are patched.
    Affected if The installed version matches 25.1.0.627, indicating the vulnerable version is present.
  4. Check if HBS 3 service is accessible
    Verify the HBS 3 web management interface is reachable. The vulnerability is exploitable remotely, so check if port 443 or 8080 (HBS 3 web interface) is exposed to the network.
    Affected if HBS 3 version 25.1.0.627 is installed AND the management interface is network-accessible, the system is at highest risk from this command injection flaw.

A system is affected if HBS 3 Hybrid Backup Sync version 25.1.0.627 is installed and the application is accessible on the network.

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

Upgrade HBS 3 Hybrid Backup Sync to version 25.1.1.673 or later. If immediate patching is not possible, restrict network exposure of the management interface and monitor for suspicious activity.

Recommended fix High confidence

HBS 3 Hybrid Backup Sync 25.1.1.673 or later

  1. Access the QNAP NAS administrative interface
  2. Open App Center or HBS 3 Hybrid Backup Sync application
  3. Check current installed version of HBS 3 Hybrid Backup Sync (should be 25.1.0.627)
  4. Update HBS 3 Hybrid Backup Sync to version 25.1.1.673 or later through QNAP's official update mechanism
  5. Verify the updated version after installation completes

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

Fix this in Hybrid Backup Sync Scoped from the published advisory
  • Consultation2.0 h
  • Implementation2.0 h
  • Testing2.0 h
  • Review / QA1.0 h
7.0 hours of engineering $1,240
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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-2024-50388 in production — separate from our analysis above.

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data