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CVE-2021-33032

10.0 · CRITICAL

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…

Published Jul 22, 2021CWE-78EPSS 52.16%

Overview

CVE-2021-33032 is a critical-severity vulnerability. It was published on July 22, 2021 and has a CVSS 3.1 base score of 10.0 (CRITICAL).

This vulnerability has a CVSS 3.1 base score of 10.0, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refnovag.github.io/posts/homematic-unauthenticated-remote-code-execution/Refwww.eq-3.de/downloads/software/HM-CCU2-Firmware_Updates/HM-CCU-2.59.7/HM-CCU2-Changelog.2.59.7.pdfRefwww.eq-3.de/downloads/software/firmware/ccu3-firmware/CCU3-Changelog.3.59.6.pdfRefnovag.github.io/posts/homematic-unauthenticated-remote-code-execution/Refwww.eq-3.de/downloads/software/HM-CCU2-Firmware_Updates/HM-CCU-2.59.7/HM-CCU2-Changelog.2.59.7.pdfRefwww.eq-3.de/downloads/software/firmware/ccu3-firmware/CCU3-Changelog.3.59.6.pdf

How CyberStrike helps

Frequently asked questions

What is CVE-2021-33032?

CVE-2021-33032 is a critical-severity vulnerability. It was published on July 22, 2021 and has a CVSS 3.1 base score of 10.0 (CRITICAL).

How severe is CVE-2021-33032?

This vulnerability has a CVSS 3.1 base score of 10.0, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2021-33032?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2021-33032?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-33032 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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