Auth bypass in Eq-3 Homematic Ccu2
CVE-2019-18939
eQ-3 Homematic CCU2 2.47.20 and CCU3 3.47.18 with the HM-Print AddOn through 1.2a installed allow Remote Code Execution by unauthenticated attackers with access to the web interface via the exec.cgi and exec1.cgi scripts, which execute TCL script content from an HTTP POST request.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.408 (98.6th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 99th percentile — 98.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.408 · newest: 0.408 · change: 0.000
Affected products
- Eq-3 Homematic Ccu2
- Eq-3 Homematic Ccu2 Firmware — versions 2.47.20
- Eq-3 Homematic Ccu3
- Eq-3 Homematic Ccu3 Firmware — versions 3.47.18
- Hm-Print Project — versions 1.2a, 1.2
Weakness classification (CWE)
Public proof-of-concept exploits
References
- psytester.github.io/CVE-2019-18939/ (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2019-18939?
- CVE-2019-18939 is a critical-severity vulnerability in Eq-3 Homematic Ccu2, classified under Missing Authentication for Critical Function. CVSS score: 9.8/10. Published 2019-11-14.
- How severe is CVE-2019-18939?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2019-18939 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.