CVE-2025-34071 CRITICAL

CVE-2025-34071: GFI Kerio Control Unsigned System Image Upload Root Code Execution

Vendor Gfi Software
Product Kerio Control
Weakness CWE-306 · Missing auth
Published July 2, 2025
Last update February 26, 2026
View on NVD All CVEs

CVSS base score

9.4/10
Attack vector Network
Attack complexity Low
Privileges required High
User interaction None
Confidentiality —
Integrity —

CVSS vector

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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

July 2, 2025 CVE published
February 26, 2026 Record updated