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CVE-2019-9726

43
FAUCET Score

CVE-2019-9726 is a Directory Traversal vulnerability affecting eQ-3 AG Homematic CCU3 firmware versions 3.43.15 and earlier, allowing unauthenticated remote attackers to read arbitrary files from the device's filesystem via the web interface. With a CVSS score of 7.5 (High), this vulnerability is easily exploitable over the network with low complexity and no user interaction, leading to high confidentiality impact. While not listed in CISA's KEV catalog, a Nuclei template for Local File Inclusion exists, indicating potential for exploitation, though there is no evidence of active exploitation, Metasploit modules, or significant community discussion.

Impacted Technologies

VendorProductVersion(s)CPE
<= 3.43.15CPE matchmatch criteria
cpe:2.3:o:eq-3:ccu3_firmware:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
16.34%
Probability of exploitation in next 30 days
EPSS Percentile
96.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
Nuclei: CVE-2019-9726 · Feb 25, 2022
This CVE's current EPSS score of 0.1634 is in the 95th percentile among its peer group of 51,466 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

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