What’s Vulnerable › Vulnerabilities

CVE-2025-34069: GFI Kerio Control GFIAgent Authentication Bypass via Proxy Forwarding

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2025-07-02 · updated 2026-06-17
• Weakness: CWE-306

Description

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.

Affected products

• GFI Software Kerio Control: 9.4.5

References

• https://ssd-disclosure.com/ssd-advisory-kerio-control-authentication-bypass-and-rce/
• https://vulncheck.com/advisories/gfi-kerio-control-auth-bypass-rce

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