dbcve.org
QtsOperating system · Qnap

CVE-2020-2492

HIGH · 7.2 CVSS v3.1 Published 2020-11-16
Fix available
A fix is available. Upgrade to 4.4.3.1421 or later.
See remediation →
78/100
Remediation priority · High
Remotely reachable Zero-click

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 · unedited
If exploited, the command injection vulnerability could allow remote attackers to execute arbitrary commands. This issue affects: QNAP Systems Inc. QTS versions prior to 4.4.3.1421 on build 20200907.

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 confidence

Command injection vulnerability in QNAP QTS firmware allowing remote attackers to execute arbitrary commands due to insufficient input validation. Affects versions prior to 4.4.3.1421 on build 20200907.

MitigationUpgrade QNAP QTS firmware to version 4.4.3.1421 or later on build 20200907 to remediate the 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
QtsOperating system
Affected:< 4.4.3.1421

CVSS 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
High
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:H/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 checks

Work through these to decide whether this CVE applies to you.

  1. Confirm QNAP QTS is running
    Access the NAS admin interface or check system information to verify the operating system is QNAP QTS
    Affected if System is not running QNAP QTS firmware
  2. Check firmware version
    Navigate to Control Panel > System > Firmware Update or use the QNAP admin interface to view the current QTS firmware version number
    Affected if Firmware version is lower than 4.4.3.1421
  3. Verify build number
    Check the firmware build date in the system information or firmware update section - the build should be dated before 20200907
    Affected if Build date is earlier than 20200907 (or build number cannot be determined and version is below 4.4.3.1421)
  4. Assess exposure to network
    Determine if the QNAP admin interface or management ports are accessible from untrusted networks or the internet
    Affected if Management interface is exposed externally without proper network segmentation or VPN

Environment is affected if QNAP QTS firmware version is below 4.4.3.1421 on a build dated before 20200907, and the management interface is network-accessible to potential attackers.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

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 data
Upgrade available Upgrade to 4.4.3.1421 or later
Fixed in 4.4.3.1421
Interim mitigation

Upgrade QNAP QTS firmware to version 4.4.3.1421 or later on build 20200907 to remediate the vulnerability.

Fix this in Qts Scoped from the published advisory
  • Consultation1.0 h
  • Implementation1.0 h
  • Testing2.0 h
  • Review / QA1.0 h
5.0 hours of engineering $860
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $1,376.

Scan for this in your stack

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2020-2492 in production — separate from our analysis above.

No notes yet

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What this is

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.

What belongs here
  • 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