CVE-2019-16199: Eq-3 Homematic CCU2 Firmware

Critical severity, CVSS 9.8. EPSS: 8.7% chance of exploitation in the next 30 days.

eQ-3 Homematic CCU2 before 2.47.18 and CCU3 before 3.47.18 allow Remote Code Execution by unauthenticated attackers with access to the web interface via an HTTP POST request to certain URLs related to the ReGa core process.

Affected products

• Eq-3 Homematic CCU2 Firmware: before 2.47.18 (fixed in 2.47.18)
• Eq-3 Homematic CCU3 Firmware: before 3.47.18 (fixed in 3.47.18)

Published 2019-09-17. Last modified 2026-06-17.