CVE-2025-29877
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 File Station 5. 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: File Station 5 5.5.6.4847 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 File Station 5 allows an authenticated remote attacker to cause a denial-of-service condition. The attacker must first obtain valid user credentials to exploit this 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>= 5.5.6.4691, < 5.5.6.4847CVSS 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
- None
- Integrity
- None
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/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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Verify File Station 5 is installedAccess the QNAP NAS admin interface and navigate to the App Center or use the QNAP CLI tool (if available) to list installed applications. Look for File Station in the installed applications list.Affected if File Station 5 is not installed, the system is not affected by this vulnerability.
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Determine installed File Station versionIn the QNAP admin interface, go to App Center, find File Station, and view its version information. Alternatively, access the NAS via SSH and check the package manifest or version file for File Station.Affected if Unable to determine the version, assume potentially affected.
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Compare version against affected rangeCompare the installed version number to the affected range: versions >= 5.5.6.4691 and < 5.5.6.4847 are vulnerable.Affected if Installed version falls within >= 5.5.6.4691 and < 5.5.6.4847, the system is affected.
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Confirm user authentication is enabledVerify that user authentication is configured on the QNAP NAS. Check if local users or domain users can log in to the File Station web interface.Affected if The vulnerability requires valid user credentials to exploit; systems with disabled user authentication have reduced attack surface but the vulnerable code may still be present.
The system is affected if File Station 5 is installed with a version greater than or equal to 5.5.6.4691 and less than 5.5.6.4847.
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 · scoped5.5.6.4847
Upgrade File Station to version 5.5.6.4847 or later to remediate this vulnerability.
File Station 5.5.6.4847 or later
- 1. Log in to the QNAP NAS admin interface
- 2. Navigate to App Center or File Station settings
- 3. Check the current File Station version (should be >= 5.5.6.4691 and < 5.5.6.4847)
- 4. Update File Station to version 5.5.6.4847 or later
- 5. Verify the update was successful by checking the File Station version number
- 6. Restart File Station service if prompted
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation1.0 h
- Implementation2.0 h
- Testing2.0 h
- Review / QA1.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2025-29877 — 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-2025-29877 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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