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Vulnerability record · CVE-2019-9726 · published 13 May 2019

CVE-2019-9726: Eq-3 ccu3 firmware path traversal vulnerability

Eq 3 · Ccu3 Firmware

Directory Traversal / Arbitrary File Read in eQ-3 AG Homematic CCU3 3.43.15 and earlier allows remote attackers to read arbitrary files of the device's filesystem. This vulnerability can be exploited by unauthenticated attackers with access to the web interface.

7.5 CVSS 3.0 High EPSS 16% · top 3.1% CWE-22 · Path traversal
7.5CVSS 3.0 base score, v2 5.0
16%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

Directory Traversal / Arbitrary File Read in eQ-3 AG Homematic CCU3 3.43.15 and earlier allows remote attackers to read arbitrary files of the device's filesystem. This vulnerability can be exploited by unauthenticated attackers with access to the web interface.

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://atomic111.github.io/article/homematic-ccu3-fileread ExploitThird Party Advisory
https://atomic111.github.io/article/homematic-ccu3-fileread ExploitThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2020-12834Eq-3 homematic ccu2 firmware incorrect default permissions vulnerabilityeQ-3 Homematic Central Control Unit (CCU)2 through 2.51.6 and CCU3 through 3.51.6 allow Remote Code Execution in the JSON API Method ReGa.runScript, …EPSS 11%9.8CVE-2019-10119Eq-3 ccu3 firmware missing authentication for critical function vulnerabilityeQ-3 HomeMatic CCU2 devices before 2.41.8 and CCU3 devices before 3.43.16 use session IDs for authentication but lack authorization checks. An attack…EPSS 2.0%9.8CVE-2019-10121Eq-3 ccu3 firmware missing authentication for critical function vulnerabilityeQ-3 HomeMatic CCU2 devices before 2.41.8 and CCU3 devices before 3.43.15 use session IDs for authentication but lack authorization checks. An attack…EPSS 4.6%9.8CVE-2019-10122Eq-3 ccu3 firmware out-of-bounds write vulnerabilityeQ-3 HomeMatic CCU2 devices before 2.41.9 and CCU3 devices before 3.43.16 have buffer overflows in the ReGa ise GmbH HTTP-Server 2.0 component, aka H…EPSS 4.1%8.8CVE-2019-14473Eq-3 ccu2 firmware missing authorization vulnerabilityeQ-3 Homematic CCU2 and CCU3 use session IDs for authentication but lack authorization checks. Consequently, a valid guest level or user level accoun…EPSS 1.9%8.8CVE-2019-10120Eq-3 ccu3 firmware vulnerabilityOn eQ-3 HomeMatic CCU2 devices before 2.41.8 and CCU3 devices before 3.43.16, automatic login configuration (aka setAutoLogin) can be achieved by con…EPSS 1.3%7.5CVE-2019-14474Eq-3 ccu3 firmware improper input validation vulnerabilityeQ-3 Homematic CCU3 3.47.15 and prior has Improper Input Validation in function 'Call()' of ReGa core logic process, resulting in the ability to star…EPSS 1.9%7.5CVE-2019-14475Eq-3 ccu2 firmware missing authorization vulnerabilityeQ-3 Homematic CCU2 2.47.15 and prior and CCU3 3.47.15 and prior use session IDs for authentication but lack authorization checks. An attacker can ob…EPSS 2.0%

Source: NIST National Vulnerability Database (record CVE-2019-9726), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.