What is CVE-2019-18938?

CVE-2019-18938 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-2019-18938?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Auth bypass in Eq-3 Homematic Ccu2

CVE-2019-18938

eQ-3 Homematic CCU2 2.47.20 and CCU3 3.47.18 with the E-Mail AddOn through 1.6.8.c installed allow Remote Code Execution by unauthenticated attackers with access to the web interface via the save.cgi script for payload upload and the testtcl.cgi script for its execution.

Vulnerability class: Broken Authentication

EPSS: 0.338 (98.2th 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 2.24.20
Eq-3 Homematic_ccu3
Eq-3 Homematic_ccu3_firmware — versions 3.47.18
Hm_email_project Hm_email — versions 1.6.8c, 1.6.8b, 1.6.8a
N/a — versions n/a

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

References

cve@mitre.org (Exploit, Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2019-18938?: CVE-2019-18938 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-2019-18938?: Critical severity. CVSS v3 base score is 9.8 out of 10.