A Remote Code Execution (RCE) vulnerability in the WebUI component of the eQ-3 HomeMatic…
Priority HIGH 75CWE-78Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-78.
Summary
A Remote Code Execution (RCE) vulnerability in the WebUI component of the eQ-3 HomeMatic CCU2 firmware up to and including version 2.57.5 and CCU3 firmware up to and including version 3.57.5 allows remote unauthenticated attackers to execute system commands as root via a simple HTTP request.
Why it matters now
EPSS 0.52161 98th 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 2.57.5 | 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:homematic_ccu3_firmware:*:*:*:*:*:*:*:* | up to 3.57.5 | 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 2.57.5 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:homematic_ccu3_firmware:*:*:*:*:*:*:*:* Versions up to 3.57.5 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-2021-33032
- 2026-10-03 Alias added: GHSA-r7xr-9q5c-fh23
References
More Eq-3 Homematic Ccu2 Firmware vulnerabilities
- TI-2019-13655 eQ-3 Homematic CCU2 2.47.20 and CCU3 3.47.18 with the HM-Print AddOn through 1.2a… CVSS 3.1CRITICAL 9.8
- TI-2019-13654 eQ-3 Homematic CCU2 2.47.20 and CCU3 3.47.18 with the E-Mail AddOn through 1.6.8.c… CVSS 3.1CRITICAL 9.8
- TI-2019-13653 eQ-3 Homematic CCU2 2.47.20 and CCU3 3.47.18 with the Script Parser AddOn through 1.8… CVSS 3.1CRITICAL 9.8
- TI-2018-05294 Directory Traversal / Arbitrary File Write / Remote Code Execution in the… CVSS 3.1CRITICAL 9.8
- TI-2020-10201 eQ-3 Homematic Central Control Unit (CCU)2 through 2.51.6 and CCU3 through 3.51.6 allow… CVSS 3.1CRITICAL 9.8
- TI-2019-12181 eQ-3 Homematic CCU2 before 2.47.18 and CCU3 before 3.47.18 allow Remote Code Execution by… CVSS 3.1CRITICAL 9.8
Sources
- CVE-2021-33032 · CVE Program
- CVE-2021-33032 · NVD
- FIRST EPSS
- GHSA-r7xr-9q5c-fh23 · GitHub Advisory Database · CC BY 4.0
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