CVE-2025-67034: Lantronix EDS5000 RCE Vulnerability

CVE-2025-67034 Overview

An authenticated command injection vulnerability has been discovered in Lantronix EDS5000 version 2.1.0.0R3. This vulnerability allows an authenticated attacker to inject arbitrary operating system commands through the "name" parameter when deleting SSL credentials via the device management interface. The injected commands are executed with root privileges, providing complete control over the affected device.

Critical Impact

Authenticated attackers can achieve root-level command execution on Lantronix EDS5000 devices, potentially compromising industrial control system networks and critical infrastructure.

Affected Products

• Lantronix EDS5000 version 2.1.0.0R3

Discovery Timeline

• 2026-03-11 - CVE CVE-2025-67034 published to NVD
• 2026-03-12 - Last updated in NVD database

Technical Details for CVE-2025-67034

Vulnerability Analysis

This vulnerability is classified as CWE-94 (Improper Control of Generation of Code), specifically manifesting as an OS command injection flaw. The vulnerability exists within the SSL credential management functionality of the Lantronix EDS5000 device's web-based management interface.

The core issue stems from insufficient input validation and sanitization of the name parameter during the SSL credential deletion process. When an authenticated user submits a request to delete SSL credentials, the application fails to properly sanitize the credential name before passing it to underlying system commands. This allows an attacker to embed shell metacharacters and arbitrary commands within the parameter value.

Since the web application executes with elevated privileges, any injected commands inherit root-level permissions. This enables attackers to perform a wide range of malicious actions including reading sensitive configuration data, modifying system settings, establishing persistent backdoors, or pivoting to other systems on the network.

Root Cause

The root cause is improper input validation in the SSL credential deletion functionality. The application directly incorporates user-supplied input from the name parameter into system shell commands without proper sanitization or escaping of special characters. This allows shell metacharacters such as semicolons, backticks, or pipe operators to break out of the intended command context and execute arbitrary code.

Attack Vector

The attack requires network access to the management interface and valid authentication credentials. Once authenticated, an attacker can craft a malicious HTTP request to the SSL credential deletion endpoint, embedding OS commands within the name parameter. Common injection techniques include using semicolons to terminate the original command and append malicious ones, or using command substitution syntax to execute nested commands.

The attack is executed over the network with low complexity, requiring no user interaction beyond the attacker's own actions. The potential impact spans full compromise of confidentiality, integrity, and availability of the affected device.

Detection Methods for CVE-2025-67034

Indicators of Compromise

• Unusual HTTP POST requests to SSL credential management endpoints containing shell metacharacters (;, |, `, $()) in parameter values
• Unexpected processes spawned by the web server process on Lantronix EDS5000 devices
• Evidence of outbound connections from EDS5000 devices to unknown external IP addresses
• Unexpected modifications to system files or creation of new user accounts on the device

Detection Strategies

• Monitor web server logs for requests to SSL credential deletion endpoints with abnormal name parameter values
• Implement network intrusion detection rules to identify command injection patterns in HTTP traffic destined for EDS5000 management interfaces
• Deploy behavioral monitoring to detect anomalous process execution chains originating from web application processes
• Audit authentication logs for suspicious login activity preceding potential exploitation attempts

Monitoring Recommendations

• Enable verbose logging on Lantronix EDS5000 devices and forward logs to a centralized SIEM for analysis
• Implement network segmentation to restrict management interface access to authorized administrative networks only
• Deploy file integrity monitoring on critical system files to detect unauthorized modifications
• Establish baseline process behavior and alert on deviations indicating potential command execution

How to Mitigate CVE-2025-67034

Immediate Actions Required

• Restrict network access to EDS5000 management interfaces using firewall rules and network segmentation
• Review and audit all user accounts with access to the device management interface
• Implement multi-factor authentication for administrative access where possible
• Monitor affected devices for indicators of compromise pending patch availability

Patch Information

Consult the Lantronix Security Page for official patch information and firmware updates. Additionally, review the CISA ICS Advisory ICSA-26-069-02 for detailed remediation guidance specific to industrial control system environments.

Workarounds

• Place EDS5000 devices behind a VPN or jump host requiring additional authentication before management interface access
• Implement strict network access control lists (ACLs) limiting management interface connectivity to known administrative IP addresses
• Disable SSL credential management functionality if not operationally required
• Consider deploying a web application firewall (WAF) or reverse proxy to filter malicious input patterns before reaching the device

# Example: Restrict management interface access using iptables on network gateway
# Allow access only from trusted management subnet
iptables -A FORWARD -d <EDS5000_IP> -p tcp --dport 443 -s 10.10.10.0/24 -j ACCEPT
iptables -A FORWARD -d <EDS5000_IP> -p tcp --dport 443 -j DROP