CVE-2019-18938

Name: CVE-2019-18938
Creator: NVD / NIST
Published: 2019-11-14T19:15:13.347+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 33.84%

Last modified Jun 17, 2026

CVE-2019-18938 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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.. EPSS estimates a 33.84% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

33.84%

98.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-306

Affected Software

Vendor	Product	Versions
Hm Email Project	Hm Email	1.6.8c
Eq-3	Homematic Ccu2 Firmware	2.24.20
Eq-3	Homematic Ccu3 Firmware	3.47.18
Hm Email Project	Hm Email	1.6.8b
Hm Email Project	Hm Email	1.6.8a
Hm Email Project	Hm Email	1.6.7c
Hm Email Project	Hm Email	1.6.7b
Hm Email Project	Hm Email	1.6.7a
Hm Email Project	Hm Email	1.6.7
Hm Email Project	Hm Email	1.6.6
Hm Email Project	Hm Email	1.6.5
Hm Email Project	Hm Email	1.6.4
Hm Email Project	Hm Email	1.6.3
Hm Email Project	Hm Email	1.6.2
Hm Email Project	Hm Email	1.6.0
Hm Email Project	Hm Email	1.6.8

References

https://psytester.github.io/CVE-2019-18938/Exploit, Third Party Advisory
https://psytester.github.io/CVE-2019-18938/Exploit, Third Party Advisory

Timeline

Published: Nov 14, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-18938?

How severe is CVE-2019-18938?

CVE-2019-18938 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 33.84% probability of exploitation in the next 30 days.

How do I fix CVE-2019-18938?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-18938?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST