eQ-3 Homematic Central Control Unit (CCU)2 through 2.51.6 and CCU3 through 3.51.6 allow…
Priority MEDIUM 55CWE-276Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA.
Summary
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).
Why it matters now
EPSS 0.11072 95th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:eq-3:homematic_ccu2_firmware:*:*:*:*:*:*:*:* | up to 2.51.6 | Vulnerable | Eq-3 |
| cpe:2.3:h:eq-3:homematic_ccu2:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Eq-3 |
| cpe:2.3:o:eq-3:ccu3_firmware:*:*:*:*:*:*:*:* | up to 3.51.6 | Vulnerable | Eq-3 |
| cpe:2.3:h:eq-3:homematic_ccu3:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Eq-3 |
- cpe:2.3:o:eq-3:homematic_ccu2_firmware:*:*:*:*:*:*:*:* Versions up to 2.51.6 Vulnerable ·Eq-3
- cpe:2.3:h:eq-3:homematic_ccu2:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Eq-3
- cpe:2.3:o:eq-3:ccu3_firmware:*:*:*:*:*:*:*:* Versions up to 3.51.6 Vulnerable ·Eq-3
- cpe:2.3:h:eq-3:homematic_ccu3:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Eq-3
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2020-12834
- 2026-10-03 Alias added: GHSA-j3ww-xcqh-98r2
References
More Eq-3 Ccu3 Firmware vulnerabilities
- TI-2019-07445 eQ-3 HomeMatic CCU2 devices before 2.41.8 and CCU3 devices before 3.43.15 use session IDs… CVSS 3.0CRITICAL 9.8
- TI-2019-07446 eQ-3 HomeMatic CCU2 devices before 2.41.9 and CCU3 devices before 3.43.16 have buffer… CVSS 3.0CRITICAL 9.8
- TI-2019-07121 Directory Traversal / Arbitrary File Read in eQ-3 AG Homematic CCU3 3.43.15 and earlier… CVSS 3.0HIGH 7.5
- TI-2019-07443 eQ-3 HomeMatic CCU2 devices before 2.41.8 and CCU3 devices before 3.43.16 use session IDs… CVSS 3.0CRITICAL 9.8
- TI-2019-10792 eQ-3 Homematic CCU2 and CCU3 use session IDs for authentication but lack authorization… CVSS 3.0HIGH 8.8
- TI-2019-07444 On eQ-3 HomeMatic CCU2 devices before 2.41.8 and CCU3 devices before 3.43.16, automatic… CVSS 3.0HIGH 8.8
Sources
- CVE-2020-12834 · CVE Program
- CVE-2020-12834 · NVD
- FIRST EPSS
- GHSA-j3ww-xcqh-98r2 · GitHub Advisory Database · CC BY 4.0
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