What’s Vulnerable › Vulnerabilities
CVE-2019-10119
- Severity: critical (CVSS 9.8 v3.0)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 2.0% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2019-07-10 · updated 2026-06-17
- Weakness: CWE-306
Description
eQ-3 HomeMatic CCU2 devices before 2.41.8 and CCU3 devices before 3.43.16 use session IDs for authentication but lack authorization checks. An attacker can obtain a session ID via an invalid login attempt to the RemoteApi account, aka HMCCU-154. This leads to automatic login as admin.
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
How to fix
Upgrade to a fixed version: Eq-3 Ccu2 Firmware 2.41.8; Eq-3 Ccu3 Firmware 3.43.16. Check the vendor advisory for mitigations.
References
- https://www.eq-3.de/Downloads/Software/CCU3-Firmware/CCU3-3.43.16/CCU3-Changelog.3.43.16.pdf
- https://www.eq-3.de/Downloads/Software/HM-CCU2-Firmware_Updates/HM-CCU-2.41.9/HM-CCU2-Changelog.2.41.9.pdf
- https://www.eq-3.de/Downloads/Software/CCU3-Firmware/CCU3-3.43.16/CCU3-Changelog.3.43.16.pdf
- https://www.eq-3.de/Downloads/Software/HM-CCU2-Firmware_Updates/HM-CCU-2.41.9/HM-CCU2-Changelog.2.41.9.pdf
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