CVE-2019-10120: Eq-3 CCU2 Firmware

High severity, CVSS 8.8. EPSS: 1.3% chance of exploitation in the next 30 days.

On eQ-3 HomeMatic CCU2 devices before 2.41.8 and CCU3 devices before 3.43.16, automatic login configuration (aka setAutoLogin) can be achieved by continuing to use a session ID after a logout, aka HMCCU-154.

Affected products

• Eq-3 CCU2 Firmware: before 2.41.8 (fixed in 2.41.8)
• Eq-3 CCU3 Firmware: before 3.43.16 (fixed in 3.43.16)

Published 2019-07-10. Last modified 2026-06-17.