CVE-2020-12834

9.8 criticalEPSS 11%

Critical (9.8) in eq-3. EPSS 11% chance of exploitation in the next 30 days.

eQ-3 Homematic Central Control Unit (CCU)2 through 2.51.6 and CCU3 through 3.51.6 allow Remote Code Execution in the JSON API Method ReGa.runScript, by unauthenticated attackers with access to the web interface, due to the default auto-login feature being enabled during first-time setup (or factory reset).

Severity

CVSS 3.1

9.8 critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS: 11% chance of exploitation in the next 30 days; higher than 95% of CVEs (scores of 2026-10-31)
CWE: CWE-276
Published: 2020-05-15
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

eq-3:ccu3_firmware
eq-3:homematic_ccu2_firmware

References

https://psytester.github.io/CVE-2020-12834/
https://psytester.github.io/CVE-2020-12834/

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