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CVE-2020-12834

CRITICAL

9.8

CVSS Score

Published: May 15, 2020 at 04:14 PM UTC

Updated: June 17, 2026 at 02:52 AM UTC

4 products affected across 1 vendorHomematic CCU2 FirmwareCCU3 FirmwareHomematic Ccu3

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Severity

CRITICAL9.8

Exploit prediction

EPSS 11%

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).

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

CCU3 Firmware · Eq 3

95%

v ≤ 3.51.6

eq-3-homematic-ccu3 (environment)

Homematic CCU2 Firmware · Eq 3

95%

v ≤ 2.51.6

eq-3-homematic-ccu2 (same device)

Homematic Ccu2 · Eq 3device

80%

All versions

Homematic Ccu3 · Eq 3device

80%

All versions

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

x_refsource_MISCExploitThird Party Advisory

Source: [email protected]

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

CVSS

9.8CRITICAL[email protected]

Attack Vector: NETWORK
Complexity: LOW
Privileges: NONE
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: HIGH
Integrity: HIGH
Availability: HIGH

Vector?

Quick Info

StatusMODIFIED

CWE

CWE-276

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