CVE-2025-44010
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 5.0.0.1 ( 2025/07/09 ) 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 confidenceA NULL pointer dereference vulnerability in Qsync Central allows an authenticated remote attacker to cause a denial-of-service condition. The attacker must first obtain valid user credentials before exploiting the NULL pointer dereference to crash the service.
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>= 4.2.0.0, < 5.0.0.1CVSS 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 installedAccess QNAP NAS via Admin UI, navigate to App Center or Control Panel > Applications > Qsync Central, or check running processes via SSH with 'ps | grep -i qsync'Affected if Qsync Central is found installed on the system
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Identify installed Qsync Central versionIn QNAP Admin UI, open App Center, locate Qsync Central, and record the version number shown; or via SSH run 'cat /share/CACHEDEV1_DATA/.qpkg/QsyncCentral/version' or check /etc/config/qsync/qsync.conf if accessibleAffected if Version cannot be determined or is 4.2.0.0 or higher
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Compare version against affected rangeReview the identified version against the vulnerable range: versions 4.2.0.0 through 5.0.0.0 are affected; version 5.0.0.1 and later are fixedAffected if Installed version is 4.2.0.0, 4.3.x, 4.4.x, 4.5.x, 4.6.x, 4.7.x, 4.8.x, 4.9.x, or 5.0.0.0 (any version >= 4.2.0.0 but < 5.0.0.1)
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Assess remote access exposureCheck if Qsync Central web interface is exposed to untrusted networks, or review QNAP firewall rules and port forwarding settings for Qsync ports (typically 8080, 443, or custom ports)Affected if Qsync Central is accessible from the internet or untrusted networks without adequate network segmentation
System is affected if Qsync Central version is >= 4.2.0.0 and < 5.0.0.1, and the service is accessible to authenticated users or compromised credentials.
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 · scoped5.0.0.1
Upgrade Qsync Central to version 5.0.0.1 or later. Until upgrade is possible, limit Qsync access to trusted users only and monitor for service disruption indicating exploitation attempts.
Qsync Central 5.0.0.1 or later (2025/07/09)
- Back up Qsync Central configuration and data before upgrading
- Access QNAP admin console and navigate to Qsync Central application
- Initiate upgrade to Qsync Central version 5.0.0.1 or later
- Verify the upgrade was successful by checking the Qsync Central version in the admin panel
- Confirm Qsync Central services are running normally
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation2.0 h
- Implementation2.0 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-2025-44010 — 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-2025-44010 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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