PatchTheCVECVE-2019-10120: On eQ-3 HomeMatic CCU2 devices before 2.41.8 and CCU3 devices before 3.43.16, automatic login configuration (a
CVE-2019-10120 is a high-severity flaw (CVSS 8.8) affecting ccu3 firmware, ccu2 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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.
Why this priority
- High severity
A fixed release or distro patch exists.
Risk facts
| CVSS score | 8.8 (High) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | Low |
| User interaction | None |
| EPSS exploit chance | 1.3% (top 30%) |
| CISA exploited list | No |
| Weakness | CWE-384 |
| Published | 2019-07-10 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2019-10120?
ccu3 firmware: upgrade to 3.43.16; ccu2 firmware: upgrade to 2.41.8. Exact commands for each OS are on this page.
Is CVE-2019-10120 being exploited?
CVE-2019-10120 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2019-10120 affect?
CVE-2019-10120 affects ccu3 firmware, ccu2 firmware. Severity is high (CVSS 8.8). 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.
How urgent is CVE-2019-10120?
Priority 48/100. High severity
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