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
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.