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…
Vulnerability class: Broken Authentication
EPSS: 0.408 (98.5th percentile) — read the EPSS interpretation.
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.
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 Hm-print — versions 1.2a, 1.2
- N/a — versions n/a
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cve@mitre.org (Exploit, Third Party Advisory, x_refsource_MISC)
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.