CVE-2020-25847
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 command injection vulnerability allows attackers to execute arbitrary commands in a compromised application. QNAP have already fixed this vulnerability in the following versions of QTS and QuTS hero.
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 confidenceCVE-2020-25847 is a command injection vulnerability in QNAP QTS and QuTS hero firmware that allows authenticated attackers to execute arbitrary commands on the underlying operating system through insufficient input validation in the affected application layer.
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< 4.5.1.1495< h4.5.1.1491CVSS 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
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:L/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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Confirm QNAP QTS or QuTS hero is in useAccess the NAS admin interface or check the system information page to identify the operating system variant (QTS or QuTS hero)Affected if The device runs QNAP QTS or QuTS hero firmware
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Identify installed firmware versionNavigate to the system administration control panel or use the 'versus' command-line utility to retrieve the current firmware version numberAffected if The firmware version is below 4.5.1.1495 for QTS or below h4.5.1.1491 for QuTS hero
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Compare version against vulnerability thresholdCompare the installed version number to the affected ranges: QTS < 4.5.1.1495 or QuTS hero < h4.5.1.1491Affected if The installed version falls within the affected ranges indicating the vulnerability is present
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Assess management interface exposureDetermine if the QNAP web administration interface or remote management services are accessible from untrusted networksAffected if The management interface is exposed to untrusted networks, allowing authenticated attackers to reach the vulnerable input validation layer
A user is affected if their QNAP device runs QTS firmware below 4.5.1.1495 or QuTS hero firmware below h4.5.1.1491 AND the management interface is accessible to an attacker who can obtain valid credentials.
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 data4.5.1.1495
Administrators should immediately update affected QNAP QTS and QuTS hero installations to the patched versions provided by QNAP. If patching is not immediately possible, network access to management interfaces should be restricted to trusted IP addresses only.
- Consultation2.0 h
- Implementation1.0 h
- Testing1.0 h
- Review / QA1.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2020-25847 — 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-2020-25847 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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