CVE-2026-20902
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 · uneditedAn OS command injection vulnerability exists in XWEB Pro version 1.12.1 and prior, enabling an authenticated attacker to achieve remote code execution on the system by injecting malicious input into the map filename field during the map upload action of the parameters route.
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 confidenceOS command injection vulnerability in XWEB Pro version 1.12.1 and prior allows authenticated attackers to achieve remote code execution by injecting malicious input into the map filename field during the map upload action of the parameters route.
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<= 1.12.1<= 1.12.1<= 1.12.1CVSS 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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Identify the installed Xweb Pro modelAccess the device web interface or check the system information page to determine if the device is an Xweb 300d Pro, 500d Pro, or 500b ProAffected if The device is any of these three models and the firmware version cannot be determined or is at or below 1.12.1
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Check the firmware versionLocate the firmware version information in the device web interface, typically found under System Settings, About, or a similar administrative pageAffected if The installed firmware version is 1.12.1 or any version prior to 1.12.1
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Verify if the map upload functionality existsNavigate through the web interface to locate the map upload feature, often found under Configuration, Parameters, or Mapping sectionsAffected if The map upload functionality is present and accessible to authenticated users
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Confirm the parameters route is accessibleCheck if the /parameters route or equivalent endpoint is accessible within the web interface, typically requiring authenticationAffected if The parameters route exists and accepts input for map filename configuration
You are affected if you have a Copeland Xweb 300d Pro, 500d Pro, or 500b Pro device running firmware version 1.12.1 or lower, and the map upload feature within the parameters route is accessible to authenticated users.
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 to a patched version if available; otherwise, implement strict input validation and sanitization on the map filename field, and ensure the application does not pass user input to system commands without proper escaping or use of parameterized interfaces.
- Consultation3.0 h
- Implementation6.0 h
- Testing4.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-20902 — 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-2026-20902 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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