CVE-2025-33036
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 path traversal vulnerability has been reported to affect Qsync Central. If a remote attacker gains a user account, they can then exploit the vulnerability to read the contents of unexpected files or system data. We have already fixed the vulnerability in the following version: Qsync Central 4.5.0.7 ( 2025/04/23 ) 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 confidencePath traversal vulnerability in Qsync Central allows authenticated remote attackers to read files outside the intended directory by manipulating file path parameters (e.g., using '../' sequences). An attacker with a valid user account can access sensitive system files beyond the expected scope.
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>= 4.5.0.3, < 4.5.0.7CVSS 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
- High
- Integrity
- None
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/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 checksWork through these to decide whether this CVE applies to you.
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Verify Qsync Central is installedAccess the Qsync Central admin panel through your QNAP NAS console or check for the Qsync Central application running on the systemAffected if Qsync Central application is present and running on the QNAP device
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Determine the installed Qsync Central versionNavigate to Qsync Central Settings, About, or System Information section in the web interface to view the version numberAffected if Version displays as 4.5.0.3, 4.5.0.4, 4.5.0.5, or 4.5.0.6 (versions less than 4.5.0.7)
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Confirm user authentication is enabledCheck User Management or Access Control settings in Qsync Central to verify that user accounts are configuredAffected if Valid user accounts exist in Qsync Central (the vulnerability requires authenticated access)
You are affected if Qsync Central version is 4.5.0.3 through 4.5.0.6 and has active user accounts configured.
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 · scoped4.5.0.7
Upgrade Qsync Central to version 4.5.0.7 or later. Until patched, limit user account access and monitor for anomalous file access patterns.
Qsync Central 4.5.0.7 or later
- Log into the QNAP NAS administrator interface
- Navigate to the App Center or Qsync Central application management
- Check the current installed version of Qsync Central (should be >= 4.5.0.3 and < 4.5.0.7)
- Locate and download Qsync Central version 4.5.0.7 or later from the QNAP App Center or QNAP download center
- Install or update Qsync Central to version 4.5.0.7
- Verify the installation was successful by checking the Qsync Central version after upgrade
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation2.0 h
- Implementation2.0 h
- Testing3.0 h
- Review / QA1.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-33036 — 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-2025-33036 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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