CVE-2021-33032

CriticalCVSS 10.0/10Last modified Jun 17, 2026

Description

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.

Metrics

CVSS 3.1 10.0/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Weakness enumeration

CWE-78

Affected software

Vendor	Product	Versions
n/a	n/a	n/a

References

https://novag.github.io/posts/homematic-unauthenticated-remote-code-execution/Exploit, Third Party Advisory
https://www.eq-3.de/downloads/software/HM-CCU2-Firmware_Updates/HM-CCU-2.59.7/HM-CCU2-Changelog.2.59.7.pdfRelease Notes, Vendor Advisory
https://www.eq-3.de/downloads/software/firmware/ccu3-firmware/CCU3-Changelog.3.59.6.pdfRelease Notes, Vendor Advisory
https://novag.github.io/posts/homematic-unauthenticated-remote-code-execution/Exploit, Third Party Advisory
https://www.eq-3.de/downloads/software/HM-CCU2-Firmware_Updates/HM-CCU-2.59.7/HM-CCU2-Changelog.2.59.7.pdfRelease Notes, Vendor Advisory
https://www.eq-3.de/downloads/software/firmware/ccu3-firmware/CCU3-Changelog.3.59.6.pdfRelease Notes, Vendor Advisory

Timeline

Published: Jul 22, 2021
Last modified: Jun 17, 2026
NVD status: Modified

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