CVE-2019-18938: Eq-3 Homematic CCU2 Firmware

Critical severity, CVSS 9.8. EPSS: 33.8% chance of exploitation in the next 30 days.

eQ-3 Homematic CCU2 2.47.20 and CCU3 3.47.18 with the E-Mail AddOn through 1.6.8.c installed allow Remote Code Execution by unauthenticated attackers with access to the web interface via the save.cgi script for payload upload and the testtcl.cgi script for its execution.

Affected products

• Eq-3 Homematic CCU2 Firmware: version 2.24.20 only
• Eq-3 Homematic CCU3 Firmware: version 3.47.18 only
• Hm Email Project Hm Email: version 1.6.8c only; version 1.6.8b only; version 1.6.8a only; version 1.6.7c only; version 1.6.7b only; version 1.6.7a only; …

Published 2019-11-14. Last modified 2026-06-17.