Remote Code Execution Vulnerability in GFI Kerio Control by GFI Software
CVE-2025-34071

9.4CRITICAL

Key Information:

Vendor

Gfi Software

Status
Kerio Control
Vendor
CVE Published:
2 July 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-34071?

The identified vulnerability in GFI Kerio Control allows an attacker with administrative access to exploit the firmware upgrade feature. This vulnerability occurs because the system's upgrade mechanism permits the upload of unsigned .img files. Attackers can tamper with these files to embed malicious scripts, like those in upgrade.sh or disk image components. Since these modified images are neither authenticated nor validated for their integrity, once uploaded, they are executed by the system, granting the attacker root access and compromising the security of the environment.

Affected Version(s)

Kerio Control 9.4.5

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2025-34071 - Proof of Concept

References

https://ssd-disclosure.com/ssd-advisory-kerio-control-aut...
third-party-advisorytechnical-descriptionexploit
https://vulncheck.com/advisories/gfi-kerio-control-auth-b...
third-party-advisory

CVSS V4

Score:
9.4
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

z3er01 of zeronvll
SSD Secure Disclosure
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CVE-2025-34071 : Remote Code Execution Vulnerability in GFI Kerio Control by GFI Software