CVE-2025-34186 in EVE X1 Server
Summary
by MITRE • 09/16/2025
Ilevia EVE X1/X5 Server version ≤ 4.7.18.0.eden contains a vulnerability in its authentication mechanism. Unsanitized input is passed to a system() call for authentication, allowing attackers to inject special characters and manipulate command parsing. Because the binary interprets non-zero exit codes from system() as successful authentication, remote attackers can bypass authentication and gain full access to the system.
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Analysis
by VulDB Data Team • 05/26/2026
The vulnerability identified as CVE-2025-34186 affects the Ilevia EVE X1/X5 Server software version 4.7.18.0.eden and earlier, presenting a critical authentication bypass flaw that fundamentally undermines the system's security posture. This vulnerability stems from improper input validation within the authentication mechanism, where user-supplied data is directly passed to a system() function without adequate sanitization or encoding. The affected system processes user credentials through a command execution interface that does not properly escape or validate special characters, creating a pathway for malicious input injection.
The technical implementation of this flaw creates a dangerous condition where attacker-controlled data flows directly into system command execution contexts. When authentication credentials are submitted, the system processes these inputs through a vulnerable command parsing mechanism that fails to distinguish between legitimate command arguments and malicious payload data. This design flaw allows attackers to inject special shell metacharacters and command operators that manipulate the underlying command execution flow, effectively enabling arbitrary command injection attacks. The vulnerability's exploitation relies on the system's flawed interpretation of command execution results, where non-zero exit codes are incorrectly treated as successful authentication outcomes.
From an operational perspective, this vulnerability presents a severe risk to system integrity and data security as it allows remote attackers to bypass authentication entirely without requiring valid credentials. The impact extends beyond simple unauthorized access to include potential full system compromise, data exfiltration, and privilege escalation opportunities. Attackers can leverage this vulnerability to execute arbitrary commands with the privileges of the affected service, potentially leading to complete system takeover. The remote nature of the attack vector means that adversaries can exploit this vulnerability from outside the network perimeter without requiring physical access or prior authentication.
The vulnerability aligns with CWE-78, which describes improper neutralization of special elements used in OS commands, and represents a classic command injection flaw that has been consistently identified in security assessments and penetration testing scenarios. This weakness also maps to ATT&CK technique T1059.001, which covers command and scripting interpreter execution through legitimate system interfaces. The affected system's binary behavior of interpreting non-zero exit codes as successful authentication creates a particularly dangerous condition where attackers can craft inputs that produce the desired exit code while simultaneously executing malicious commands, making detection and prevention significantly more challenging.
Organizations should implement immediate mitigations including updating to the latest available version of the Ilevia EVE X1/X5 Server software that addresses this vulnerability. Network segmentation and firewall rules should be implemented to restrict access to the affected system, while monitoring systems should be enhanced to detect unusual command execution patterns. Input validation and sanitization measures must be strengthened throughout the authentication pipeline, with proper encoding of special characters and implementation of allowlists for acceptable input values. Additionally, privileged access should be restricted to minimize potential damage from successful exploitation attempts, and regular security assessments should be conducted to identify similar vulnerabilities in other system components.