How severe is CVE-2019-9726?

CVE-2019-9726 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2019-9726 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 16% (96th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-9726?

CVE-2019-9726 affects Eq-3 Ccu3 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-9726?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2019-9726 published?

CVE-2019-9726 was published on 2019-05-13 and last updated on 2026-06-17.

CVE-2019-9726

CVE-2019-9726 is a high-severity vulnerability in Eq-3 Ccu3 Firmware with a CVSS 3.x base score of 7.5. Its EPSS exploit-prediction score of 16% places it in the 96th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-22.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 16% (96th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-22
Affected product: Eq-3 Ccu3 Firmware
Published: 2019-05-13
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2019-9726?: 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.
How severe is CVE-2019-9726?: CVE-2019-9726 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2019-9726 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 16% (96th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-9726?: CVE-2019-9726 affects Eq-3 Ccu3 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-9726?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2019-9726 published?: CVE-2019-9726 was published on 2019-05-13 and last updated on 2026-06-17.

References

https://atomic111.github.io/article/homematic-ccu3-fileread

Affected products (1)

cpe:2.3:o:eq-3:ccu3_firmware:*:*:*:*:*:*:*:*

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