CVE-2025-34071

GFI Kerio Control Unsigned System Image Upload Root Code Execution

Severity Score

9.4

*CVSS v4

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Attend

*SSVC

Descriptions

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.

*Credits: z3er01 of zeronvll, SSD Secure Disclosure

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Attack Requirements

None

Privileges Required

High

User Interaction

None

System

Vulnerable | Subsequent

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:Attend

Exploitation

Poc

Automatable

Tech. Impact

Total

* Organization's Worst-case Scenario

Timeline

2025-04-15 CVE Reserved
2025-07-02 CVE Published
2025-07-03 CVE Updated
2025-07-03 EPSS Updated
2025-07-03 First Exploit
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-306: Missing Authentication for Critical Function

CAPEC

CAPEC-115: Authentication Bypass
CAPEC-137: Parameter Injection

References (2)

URL	Tag	Source
https://vulncheck.com/advisories/gfi-kerio-control-auth-bypass-rce	Third Party Advisory

URL	Date	SRC
https://ssd-disclosure.com/ssd-advisory-kerio-control-authentication-bypass-and-rce	2025-07-03

URL	Date	SRC

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
GFI Software Search vendor "GFI Software"		Kerio Control Search vendor "GFI Software" for product "Kerio Control"				9.4.5 Search vendor "GFI Software" for product "Kerio Control" and version "9.4.5"		en		Affected