Auth bypass in Gfi Kerio Control
CVE-2025-34069
An authentication bypass vulnerability exists in GFI Kerio Control 9.4.5 due to insecure default proxy configuration and weak access control in the GFIAgent service. The non-transparent proxy on TCP port 3128 can be used to forward unauthenticated requests to internal services such as GFIAgent, bypassing firewall restrictions and exposing internal management endpoints. This enables unauthenticated attackers to access the GFIAgent service on ports 7995 and 7996, retrieve the appliance UUID, and issue administrative requests via the proxy. Exploitation results in full administrative access to the Kerio Control appliance.
Vulnerability class: Broken Authentication
EPSS: 0.006 (46.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Gfi Kerio_control — versions 9.4.5
- Gfi Software Kerio Control — versions 9.4.5
Weakness classification (CWE)
References
- disclosure@vulncheck.com (Exploit, technical-description, Third Party Advisory, exploit, third-party-advisory)
- disclosure@vulncheck.com (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2025-34069?
- CVE-2025-34069 is a critical-severity vulnerability in Gfi Kerio Control, classified under Missing Authentication for Critical Function. CVSS score: 9.8/10. Published 2025-07-02.
- How severe is CVE-2025-34069?
- Critical severity. CVSS v3 base score is 9.8 out of 10.