CVE-2025-54170
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 · uneditedAn out-of-bounds read vulnerability has been reported to affect Qsync Central. If a remote attacker gains a user account, they can then exploit the vulnerability to obtain secret data. 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 · moderate confidenceAn out-of-bounds read vulnerability in Qsync Central allows an authenticated remote attacker to read data beyond allocated memory boundaries, potentially exposing secret information. The vulnerability is exploitable after the attacker obtains valid user credentials.
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
- 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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Identify Qsync Central installationLog into the QNAP NAS web administration interface and navigate to the Qsync Central application, or check running services on the QNAP device for Qsync Central processes.Affected if Qsync Central is installed and running on the device
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Locate the installed versionIn the QNAP web interface, go to App Center or the Qsync Central settings page where the version number is displayed. Alternatively, access the NAS via SSH and check the Qsync package version using command-line tools if available.Affected if The displayed version cannot be determined or is not visible
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Compare version against affected rangeReview the identified version number and compare it to the vulnerable range: versions 5.0.0.0 through 5.0.0.3 are affected. Versions below 5.0.0.0 or at or above 5.0.0.4 are not vulnerable.Affected if The installed version is 5.0.0.0, 5.0.0.1, 5.0.0.2, or 5.0.0.3
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Verify credential exposure riskAssess whether user accounts with valid credentials for Qsync Central exist in the environment. The vulnerability requires an attacker to obtain valid user credentials before exploitation.Affected if Valid Qsync Central user credentials are present and accessible to unauthorized parties
A user is affected if Qsync Central version 5.0.0.0 through 5.0.0.3 is installed and user credentials are present that could be obtained by an attacker.
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
Upgrade Qsync Central to version 5.0.0.4 or later. Additionally, enforce strong password policies and consider implementing multi-factor authentication to reduce the likelihood of credential compromise that would enable exploitation.
Qsync Central 5.0.0.4
- 1. Identify the current version of Qsync Central installed on your system
- 2. Verify the version is within the affected range (>= 5.0.0.0 and < 5.0.0.4)
- 3. Download Qsync Central version 5.0.0.4 or later from the official QNAP website
- 4. Follow QNAP's standard upgrade procedure for Qsync Central to apply the update
- 5. After upgrading, verify the new version is 5.0.0.4 or higher
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-2025-54170 — 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-2025-54170 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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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.
- 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