CVE-2025-54146
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 · uneditedA NULL pointer dereference vulnerability has been reported to affect Qsync Central. If a remote attacker gains a user account, they can then exploit the vulnerability to launch a denial-of-service (DoS) attack. We have already fixed the vulnerability in the following version: Qsync Central 5.0.0.4 ( 2026/01/20 ) 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 · high confidenceA NULL pointer dereference vulnerability in Qsync Central can be exploited by an authenticated remote attacker to cause a denial-of-service condition. The attacker first needs to obtain valid user credentials before triggering the 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>= 5.0.0.0, < 5.0.0.4CVSS 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
- None
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/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 checksWork through these to decide whether this CVE applies to you.
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Confirm Qsync Central is installedLocate the Qsync Central application on the QNAP NAS device. This is typically found in the App Center or via command line tools that list installed QNAP packages.Affected if Qsync Central is installed on the device
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Identify the installed version of Qsync CentralAccess the QNAP admin interface, go to App Center, find Qsync Central, and note the version number displayed. Alternatively, use the QNAP command line or configuration files to retrieve the package version.Affected if The version shown is 5.0.0.0, 5.0.0.1, 5.0.0.2, or 5.0.0.3 (any version >= 5.0.0.0 but < 5.0.0.4)
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Verify the service is accessible over the networkConfirm that the Qsync Central web interface or API endpoint is reachable, as the vulnerability requires remote authentication to exploit.Affected if Qsync Central is exposed and accepts authentication credentials
The environment is affected if Qsync Central version is 5.0.0.0, 5.0.0.1, 5.0.0.2, or 5.0.0.3 (any version from 5.0.0.0 up to but not including 5.0.0.4) and the attacker can obtain valid user credentials to authenticate.
Generated from the published advisory. Verify against your own configuration.
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 · scoped5.0.0.4
Apply Qsync Central version 5.0.0.4 or later to address the NULL pointer dereference. Ensure user account security to prevent unauthorized attackers from gaining the initial authentication required to exploit this vulnerability.
Qsync Central 5.0.0.4
- Log in to the QNAP NAS admin interface using an administrator account
- Navigate to the App Center or Qsync Central management page
- Check for available updates for Qsync Central
- Update Qsync Central to version 5.0.0.4 or later
- Verify the installation completed successfully and the service is running
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation1.0 h
- Implementation1.0 h
- Testing2.0 h
- Review / QA1.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-54146 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2025-54146 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- 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
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