by Kastro
Paper/Archive/CVE-2025-34069

CVE-2025-34069

GFI Software Kerio Control — GFI Kerio Control GFIAgent Authentication Bypass via Proxy Forwarding

EPSS 0.8%public exploitCVSS 9.8
critical.is priorityof 100
51
CVSS 9.8 (NVD)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 55.5.555 × 2011.1Exploit: SSVC poc+1010.0SSVC exploitation: poc+100.0
Description · from the CVE record

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

ProductAffectedFixed inSource
Kerio Control9.4.5–CNA

Scores by source

NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
VulnCheck (CNA)9.5CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
CISA ADPSSVCExploitation: poc · Automatable: no · Technical impact: partial

References

exploitssd-disclosure.com/ssd-advisory-kerio-control-authentication-bypass-and-rcewriteupvulncheck.com/advisories/gfi-kerio-control-auth-bypass-rce