Critical severity · published Jul 22, 2021
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…
10.0
CVSS
52.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)52.2% · higher than 99% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
HC
Homematic Ccu2 Firmware · Eq-3
through 2.57.5 · source: NVD
HC
Homematic Ccu3 Firmware · Eq-3
through 3.57.5 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-33032
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-33032
Exploit
https://novag.github.io/posts/homematic-unauthenticated-remote-code-execution/
Release Notes
https://www.eq-3.de/downloads/software/HM-CCU2-Firmware_Updates/HM-CCU-2.59.7/HM-CCU2-Changelog.2.59.7.pdf
Release Notes
https://www.eq-3.de/downloads/software/firmware/ccu3-firmware/CCU3-Changelog.3.59.6.pdf
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