RCE in Eq-3 Homematic Ccu2
CVE-2021-33032
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.
Vulnerability class: Command Injection (OS Command Injection)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 10.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.522 (99.0th percentile), scored .
High probability of exploitation in the next 30 days — patch promptly. 99th percentile — 99.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.522 · newest: 0.522 · change: 0.000
Affected products
Weakness classification (CWE)
References
- novag.github.io/posts/homematic-unauthenticated-remote-code-execution/ (Exploit, Third Party Advisory)
- www.eq-3.de/downloads/software/HM-CCU2-Firmware_Updates/HM-CCU-2.59.7/HM-CCU2-C… (Release Notes, Vendor Advisory)
- www.eq-3.de/downloads/software/firmware/ccu3-firmware/CCU3-Changelog.3.59.6.pdf (Release Notes, Vendor Advisory)
Frequently asked questions
- What is CVE-2021-33032?
- CVE-2021-33032 is a critical-severity vulnerability in Eq-3 Homematic Ccu2, classified under OS Command Injection. CVSS score: 10.0/10. Published 2021-07-22.
- How severe is CVE-2021-33032?
- Critical severity. CVSS v3 base score is 10.0 out of 10.