CVE-2019-18826: Barco Clickshare Cs-100 Firmware

Critical severity, CVSS 9.8. EPSS: 0.7% chance of exploitation in the next 30 days.

Barco 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.

Affected products

• Barco Clickshare Cs-100 Firmware: before 1.9.0 (fixed in 1.9.0)
• Barco Clickshare Cse-200+ Firmware: before 1.9.0 (fixed in 1.9.0)
• Barco Clickshare Cse-200 Firmware: before 1.9.0 (fixed in 1.9.0)
• Barco Clickshare Cse-800 Firmware: before 1.9.0 (fixed in 1.9.0)

Published 2019-12-16. Last modified 2026-06-17.