CVE-2021-33032 in the critical feed json
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 a…
published 2021-07-22 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-19752
- cvss
- 10.0
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 52.2%
- EPSS 52.2% chance of exploitation in 30 days, percentile 98%
- public exploits
- 0
- none known
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.
Exploit prediction
52.16% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- novag.github.io https://novag.github.io/posts/homematic-unauthenticated-remote-code-execution/ referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 10.0 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H |
| NVD | 2.0 | 10.0 | AV:N/AC:L/Au:N/C:C/I:C/A:C |
Classification
- Weakness
-
- CWE-78 Improper Neutralization of Special Elements used in an OS Command
References
-
novag.github.io
/posts/homematic-unauthenticated-remote-code-execution/
exploit, third-party-advisory
-
eq-3.de
/downloads/software/HM-CCU2-Firmware_Updates/HM-CCU-2.59.7/HM-CCU2-Changelog.2.59.7.pdf
release-notes, vendor-advisory
-
eq-3.de
/downloads/software/firmware/ccu3-firmware/CCU3-Changelog.3.59.6.pdf
release-notes, vendor-advisory
Sources
- CVE List CVE-2021-33032
- NVD CVE-2021-33032
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