CVE-2020-11420
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 · uneditedUPS Adapter CS141 before 1.90 allows Directory Traversal. An attacker with Admin or Engineer login credentials could exploit the vulnerability by manipulating variables that reference files and by doing this achieve access to files and directories outside the web root folder. An attacker may access arbitrary files and directories stored in the file system, but integrity of the files are not jeopardized as attacker have read access rights only.
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 confidenceDirectory traversal vulnerability in UPS Adapter CS141 web interface versions before 1.90 allows authenticated attackers (Admin or Engineer roles) to manipulate file path parameters to access files outside the web root folder, achieving read-only access to arbitrary system files.
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>= 1.66, <= 1.88< 1.90CVSS 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 CS141 firmware versionAccess the device web interface and navigate to System > Status or System > Information page to view the firmware version. Alternatively, check the device startup logs or administrative console for the firmware build number.Affected if The firmware version is between 1.66 and 1.88 (inclusive) for Abb Cs141, or any version below 1.90 for Generex Cs141.
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Confirm web interface is accessibleVerify that the CS141 web interface (typically on ports 80 or 443) is reachable from network locations. Attempt to access the device IP via HTTP/HTTPS in a browser.Affected if The web interface is exposed and reachable on the network.
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Check if authentication is required for file operationsLog into the web interface with an Admin or Engineer role account and navigate to any file browser, download, or configuration import/export functionality that accepts file path parameters.Affected if File path parameters can be manipulated without additional validation or the application accepts path traversal sequences (such as ../../) in file-related fields.
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Review user role permissionsNavigate to User Management or Access Control settings in the web interface and enumerate all defined roles. Note which roles have file access or configuration privileges.Affected if Any role other than read-only operators has permission to access file-related features, as the vulnerability requires Admin or Engineer role authentication.
You are affected if your CS141 firmware version is below 1.90 AND the web interface is accessible with an authenticated Admin or Engineer account that can access file-related parameters.
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 data1.90
Upgrade to CS141 version 1.90 or later which contains the security fix. Until patched, enforce strict input validation on file path parameters and limit administrative access to trusted networks only.
- Consultation2.0 h
- Implementation4.0 h
- Testing3.0 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 $2,800.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2020-11420 — 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-2020-11420 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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