What is the CVSS score of EUVD-2025-19720?

EUVD-2025-19720 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%.

Is there a public PoC exploit available for EUVD-2025-19720?

Yes, a public proof-of-concept exploit is available for EUVD-2025-19720. Prioritise patching immediately. EPSS: 1.0%.

How to fix or mitigate EUVD-2025-19720?

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 EUVD-2025-19720

| CVE-2025-34071 CRITICAL

Missing Authentication for Critical Function (CWE-306)

2025-07-02 disclosure@vulncheck.com

Authentication Bypass RCE Kerio Control Gfi

9.8

CVSS 3.1 · NVD

View

Vulnerability Assessment

Weakness	CWE CWE-306 OWASP Top 10:2025 A07:2025 - Authentication Failures ASVS 5.0 V6 - Authentication Authentication required for critical functions MITRE ATT&CK 1 technique across 1 tactic: Initial Access The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. Sign in to read
Impact	Unauthorized access to protected functionality, data, or administrative interfaces, potentially leading to full system compromise. With a CVSS score of 9.8 (CRITICAL), this represents a critical risk.
Exploit ScenarioDerived	An attacker manipulates authentication tokens, exploits logic flaws, or uses default credentials to bypass the login mechanism and access restricted areas.

Act Now Prioritize within 24-48h. Why: CRITICAL severity + public POC available.

No patch listed yet 1.0% exploitation probability (EPSS)

Get an e-mail when this CVE is exploited, patched or re-scored. Free account.

Alert me

AnalysisAIv1 – Mar 16, 2026

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.

Earlier versions of this analysis (1)

v1 Mar 16, 2026 - 01:55 CVSS 9.8

RemediationAI

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

Affected VersionsENISA

Kerio Control 9.4.5

Affected Packages

euvd kerio_control no fix

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

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).

Know when Kerio Control gets its next vulnerability

Watch products and get an email when something new is published
Check this CVE against your own stack and servers
Exploit and PoC references, threat intelligence from 22 sources

Continue with Google Continue with GitHub

No credit card · 7-day full trial

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

PoC Detected

Sep 17, 2025 - 13:41 vuln.today

Public exploit code

CVE Published

Jul 02, 2025 - 14:15 nvd

CRITICAL 9.8

Executive ViewAI

Why It Matters

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. Attackers could bypass security controls to gain unauthorized access to protected resources and sensitive data. Proof-of-concept code is publicly available, increasing the risk of exploitation. Organizations should apply vendor updates immediately when available and implement compensating controls in the interim.

Business Impact: Severe

Compensating Controls

Apply vendor patch. If immediate patching is not feasible: (1) Implement network-level access controls; (2) Enable MFA where possible; (3) Monitor authentication logs for anomalous access.

Threat Intelligence Overview

EPSS Score

1.0%

Top 24% exploitable

Exploit

POC

Public exploit code exists

Data Quality

4 sources

Confidence: Medium

EUVD

NVD

CVE.org

EPSS

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity CRITICAL

CISA KEV No

Public POC Yes

EPSS 1.0%

Patch available No

Active threat No

Deciding rule

CRITICAL severity + public POC available

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.