Is CVE-2020-12834 actively exploited?

No active exploitation of CVE-2020-12834 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2020-12834 be exploited remotely?

Yes. CVE-2020-12834 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2020-12834?

CVE-2020-12834 has a CVSS score of 9.8 (CRITICAL).

HOME VULNERABILITIESCVE-2020-12834

CRITICAL

CVE-2020-12834

CWE-276Published: May 15, 2020· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official 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).

NVD Source

Technical Analysis

CVE-2020-12834 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.