CVE-2025-34071

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 v4.0

9.4 CRITICALCVSS: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:X/V:X/RE:X/U:X

CVSS v3.1

9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

0.70% chance of exploitation in the next 30 days, 51th percentile

Published

2025-07-02

Updated

2026-02-26

Proof-of-concept exploits (1)

• https://ssd-disclosure.com/ssd-advisory-kerio-control-authentication-bypass-and-rce/

References

• CVE Record
• NVD entry

Related

• CVE-2025-34070
• CVE-2025-34072
• CVE-2025-34069
• CVE-2025-34073
• CVE-2025-34068
• CVE-2025-34074