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Vulnerability record · CVE-2025-34071 · published 2 July 2025

CVE-2025-34071: Gfi kerio control missing authentication for critical function vulnerability

Gfi · Kerio Control

A remote code execution vulnerability in GFI Kerio Control 9.4.5 allows attackers with administrative access to upload and execute arbitrary code through the firmware upgrade feature. The system upgrade mechanism accepts unsigned .img files, which can be modified to include malicious scripts within the upgrade.sh or disk image components. These modified upgrade images are not validated for authenticity or integrity, and are executed by the system post-upload, enabling root access.

9.4 CVSS 4.0 Critical EPSS 0.76% · top 46.6% CWE-306 · Missing authentication for critical function
9.4CVSS 4.0 base score
0.76%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References, 1 tagged exploit
17 Jun 2026Last modified by NVD

Description

A remote code execution vulnerability in GFI Kerio Control 9.4.5 allows attackers with administrative access to upload and execute arbitrary code through the firmware upgrade feature. The system upgrade mechanism accepts unsigned .img files, which can be modified to include malicious scripts within the upgrade.sh or disk image components. These modified upgrade images are not validated for authenticity or integrity, and are executed by the system post-upload, enabling root access.

CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://ssd-disclosure.com/ssd-advisory-kerio-control-authentication-bypass-and-rce/ ExploitThird Party Advisory
https://vulncheck.com/advisories/gfi-kerio-control-auth-bypass-rce Third Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

10.0CVE-2025-34070Gfi kerio control missing authentication for critical function vulnerabilityA missing authentication vulnerability in the GFIAgent component of GFI Kerio Control 9.4.5 allows unauthenticated remote attackers to perform privil…EPSS 0.73%9.5CVE-2025-34069Gfi kerio control missing authentication for critical function vulnerabilityAn authentication bypass vulnerability exists in GFI Kerio Control 9.4.5 due to insecure default proxy configuration and weak access control in the G…EPSS 0.67%8.8CVE-2024-52875Gfi kerio control vulnerabilityAn issue was discovered in GFI Kerio Control 9.2.5 through 9.4.5. The dest GET parameter passed to the /nonauth/addCertException.cs and /nonauth/gues…EPSS 29%6.1CVE-2019-16414Gfi kerio control cross-site scripting vulnerabilityA DOM based XSS in GFI Kerio Control v9.3.0 allows embedding of malicious code and manipulating the login page to send back a victim's cleartext cred…EPSS 1.6%8.8CVE-2026-67277MikroTik RouterOS btest missing authentication leaks kernel memory and crashes kernelRouterOS accepts a "related" btest connection before the primary session is authenticated, letting an unauthenticated client start an IPv4 UDP test. …KEVEPSS 1.6%analysed8.8CVE-2026-59822LiteLLM MCP endpoint auth bypass via OAuth2 passthrough fallbackLiteLLM's MCP Streamable HTTP endpoint, prior to 1.84.0, let an unauthenticated attacker send a fabricated Authorization header that triggered an OAu…KEVEPSS 0.84%analysed9.3CVE-2026-72529TrueConf Server missing authentication allows remote script executionTrueConf Server versions 5.3.X through 5.3.9, 5.4.X through 5.4.9, 5.5.X through 5.5.5, and earlier expose an undocumented function on port 4307/TCP …KEVEPSS 1.5%analysed9.8CVE-2026-46817Oracle E-Business Suite Payments missing authentication allows takeoverOracle Payments in Oracle E-Business Suite 12.2.3 through 12.2.15 contains an easily exploitable flaw in the File Transmission component. An unauthen…KEVEPSS 0.81%analysed

Source: NIST National Vulnerability Database (record CVE-2025-34071), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.