CVE-2019-18826
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 · uneditedBarco ClickShare Button R9861500D01 devices before 1.9.0 have Improper Following of a Certificate's Chain of Trust. The embedded 'dongle_bridge' program used to expose the functionalities of the ClickShare Button to a USB host, does not properly validate the whole certificate chain.
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 confidenceThe 'dongle_bridge' USB host program in Barco ClickShare Button R9861500D01 devices before firmware 1.9.0 fails to properly validate the complete certificate chain, allowing potentially malicious or compromised certificates to be accepted. This could enable man-in-the-middle attacks or execution of untrusted code on the affected device.
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< 1.9.0< 1.9.0< 1.9.0< 1.9.0CVSS 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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Identify the ClickShare device modelLocate the model label on the device or access the admin web interface to identify whether the unit is a Barco Clickshare CS 100, CSE 200, CSE 200+, or CSE 800Affected if The device model is any of the four affected models (CS 100, CSE 200, CSE 200+, or CSE 800)
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Check the installed firmware versionAccess the ClickShare admin web interface or use the ClickShare configuration tool to view the current firmware version installed on the deviceAffected if The firmware version is below 1.9.0 (for example, 1.8.x or earlier)
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Verify the dongle_bridge USB host componentReview the device system logs or firmware release notes to confirm the dongle_bridge USB host program is present on this device modelAffected if The dongle_bridge component is present and the firmware version is below 1.9.0
A user is affected if they have a Barco Clickshare CS 100, CSE 200, CSE 200+, or CSE 800 device running firmware version lower than 1.9.0.
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.
dbcve · scoped1.9.0
Upgrade all Barco ClickShare Button R9861500D01 devices to firmware version 1.9.0 or later, which implements proper certificate chain validation.
Firmware version 1.9.0
- 1. Identify the exact ClickShare model (CS 100, CSE 200, CSE 200+, or CSE 800) in your environment
- 2. Navigate to Barco's official support website at www.barco.com
- 3. Locate the firmware download section for your specific ClickShare model
- 4. Download firmware version 1.9.0 or later
- 5. Follow Barco's published firmware update procedure for your device model (typically involves connecting via the admin interface and uploading the firmware file)
- 6. Verify the firmware version has been successfully updated to 1.9.0 or later
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation4.0 h
- Implementation2.0 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 $2,864.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2019-18826 — 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-2019-18826 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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