Critical severity · published Jul 2, 2025
CVE-2025-34071
GFI Kerio Control Unsigned System Image Upload Root Code Execution
9.8
CVSS
0.8%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.8% · higher than 57% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
KC
Kerio Control · GFI Software
9.4.5 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-34071
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-34071
Exploit
https://ssd-disclosure.com/ssd-advisory-kerio-control-authentication-bypass-and-rce/
Third Party Advisory
https://vulncheck.com/advisories/gfi-kerio-control-auth-bypass-rce
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