CVE-2020-12834

CRITICAL

eQ-3 Homematic CCU2 < 2.51.6 & CCU3 < 3.51.6 - RCE via ReGa.runScript JSON API

Title source: llm

Description

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).

References (1)

Core 1

Core References

Exploit, Third Party Advisory x_refsource_misc

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

Scores

CVSS v3 9.8

EPSS 0.1107

EPSS Percentile 95.4%

Attack Vector NETWORK

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

Details

CWE

CWE-276

Status published

Products (2)

eq-3/ccu3_firmware < 3.51.6

eq-3/homematic_ccu2_firmware < 2.51.6

Published May 15, 2020

Tracked Since Feb 18, 2026