CVE-2025-34069Public exploitNetwork attack vector

Administrative access via unauthenticated proxy forwarding

Published Jul 2, 2025 · Updated Nov 19, 2025

Authentication bypass in GFI Software Kerio Control 9.4.5 allows remote attackers to gain administrative access via proxy forwarding. The default-enabled proxy on TCP port 3128 forwards requests to unauthenticated GFIAgent services, and the RemoteServer /proxy handler relays appliance UUID-bearing requests to the administrative portal. The attacker must reach the proxy or GFIAgent ports; successful exploitation permits administrative requests that can change appliance configuration.

CVSS severity9.5
Critical
EPSS probability0.63%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in GFI Software Kerio Control 9.4.5 allows remote attackers to gain administrative access via proxy forwarding. The default-enabled proxy on TCP port 3128 forwards requests to unauthenticated GFIAgent services, and the RemoteServer /proxy handler relays appliance UUID-bearing requests to the administrative portal. The attacker must reach the proxy or GFIAgent ports; successful exploitation permits administrative requests that can change appliance configuration.

The record

CVE
CVE-2025-34069
Published
Jul 2, 2025
Updated
Nov 19, 2025
Vendor
GFI Software
Product
Kerio Control
Classifications
CWE-306, CAPEC-137, CAPEC-115, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 2, 2025CVE publishedPublication date reported by the CVE source.
  2. Nov 19, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=9.4.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

GFI Software · Kerio Controlversion=9.4.5

Published CVSS scores

9.5VulnCheckCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-306Missing Authentication for Critical Function
CAPEC-137Parameter Injection
CAPEC-115Authentication Bypass
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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