What is the CVSS score of CVE-2025-34071?

CVE-2025-34071 has a CVSS 3.1 base score of 9.8 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 1.0%.

Which versions of Kerio Control are affected by CVE-2025-34071?

Organizations using A remote code execution vulnerability in GFI Kerio Control 9.4.5 face critical risk from CVE-2025-34071, a missing authentication vulnerability rated CVSS 9.8.

Is there a public PoC exploit available for CVE-2025-34071?

Yes, a public proof-of-concept exploit is available for CVE-2025-34071. Prioritise patching immediately. EPSS: 1.0%.

How to fix or mitigate CVE-2025-34071?

Within 24 hours: Identify all affected systems running GFI Kerio Control 9.4.5 allows attackers with administrative and apply vendor patches immediately. Audit authentication configurations and rotate any potentially compromised credentials.

Kerio Control CVE-2025-34071

EUVD-2025-19720 CRITICAL

Missing Authentication for Critical Function (CWE-306)

2025-07-02 disclosure@vulncheck.com

RCE Authentication Bypass Kerio Control

9.8

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

9.8 CRITICAL

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

EUVD ID Assigned

Mar 16, 2026 - 01:55 euvd

EUVD-2025-19720

Analysis Generated

Mar 16, 2026 - 01:55 vuln.today

PoC Detected

Sep 17, 2025 - 13:41 vuln.today

Public exploit code

CVE Published

Jul 02, 2025 - 14:15 nvd

CRITICAL 9.8

DescriptionCVE.org

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.

Analysis

Technical ContextAI

An authentication bypass vulnerability allows attackers to circumvent login mechanisms and gain unauthorized access without valid credentials. This vulnerability is classified as Missing Authentication for Critical Function (CWE-306).

RemediationAI

Implement robust authentication mechanisms. Use multi-factor authentication. Review authentication logic for bypass conditions. Remove default credentials.