What is CVE-2019-9727?

CVE-2019-9727 is a high-severity vulnerability in Eq-3 Ccu3, classified under Missing Authentication for Critical Function. CVSS score: 7.5/10. Published 2019-05-13.

How severe is CVE-2019-9727?

High severity. CVSS v3 base score is 7.5 out of 10.

Auth bypass in Eq-3 Ccu3

CVE-2019-9727

Unauthenticated password hash disclosure in the User.getUserPWD method in eQ-3 AG Homematic CCU3 3.43.15 and earlier allows remote attackers to retrieve the GUI password hashes of GUI users. This vulnerability can be exploited by unauthenticated attackers with access to the web interface.

Vulnerability class: Broken Authentication

Published 2019-05-13 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.022 (81.6th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 82nd percentile — 81.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.022 · newest: 0.022 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

References

atomic111.github.io/article/homematic-ccu3-unauthenticated-password-hash-disclo… (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2019-9727?: CVE-2019-9727 is a high-severity vulnerability in Eq-3 Ccu3, classified under Missing Authentication for Critical Function. CVSS score: 7.5/10. Published 2019-05-13.
How severe is CVE-2019-9727?: High severity. CVSS v3 base score is 7.5 out of 10.