CVE-2019-7183
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 · uneditedThis improper link resolution vulnerability allows remote attackers to access system files. To fix this vulnerability, QNAP recommend updating QTS to their latest versions.
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 confidenceThis is an improper link resolution vulnerability (symlink attack) in QNAP QTS that allows remote attackers to traverse symbolic links to access system files outside the intended directory boundaries. The vulnerability stems from insufficient validation of symbolic links during file operations.
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= 4.2.6= 4.3.3.0868= 4.3.3.0998= 4.3.4.0899= 4.3.4.1029= 4.3.6.0895= 4.3.6.0907= 4.3.6.0923= 4.3.6.0944= 4.3.6.0959= 4.3.6.0979= 4.3.6.0993CVSS 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
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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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Check QNAP QTS firmware versionLog into the QNAP admin web interface and look at the dashboard for the QTS version, or run 'cat /proc/version' or 'getconf SERVER_VERSION' via SSH if you have shell accessAffected if The installed version matches any of these: 4.2.6, 4.3.3.0868, 4.3.3.0998, 4.3.4.0899, 4.3.4.1029, 4.3.6.0895, 4.3.6.0907, 4.3.6.0923, 4.3.6.0944, 4.3.6.0959, 4.3.6.0979, or 4.3.6.0993
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Verify QTS build numberIn the QNAP admin interface, go to Control Panel > System > Firmware Update > Build: the full build number includes the version and build (for example 4.3.6 build 0959)Affected if The full build number exactly matches one of the affected versions listed above
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Check if QNAP web server is accessible externallyReview your network configuration and firewall rules to determine if the QNAP admin interface (ports 80/443 or 8080/8081) is exposed to untrusted networksAffected if The QTS web management interface is reachable from the internet or untrusted networks, making the symlink traversal exploitable remotely
You are affected if your QNAP QTS firmware build matches any of the 12 vulnerable versions listed and the web interface is network-accessible to potential attackers.
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.
From vendor dataUpdate QNAP QTS to the latest version as recommended by QNAP to patch the improper link resolution vulnerability.
- Consultation2.0 h
- Implementation2.0 h
- Testing4.0 h
- Review / QA1.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $2,464.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2019-7183 — 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-2019-7183 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
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