CVE-2026-80145 in SLC8000
Summary
by MITRE • 09/22/2026
Lantronix SLC8000 before firmware v9.7.0.2, EMG8500/EMG7500 before firmware v9.7.0.1, and all firmware versions of SLB882/SLCx-03/SLCx-02 contain a command injection vulnerability that allows authenticated attackers with the services permission to execute arbitrary shell commands as root by exploiting the set cifs password command that passes unsanitized user input to a system() call. Attackers with the services permission can authenticate to the terminal or CLI interface and inject malicious commands through the unsanitized parameter to achieve complete loss of confidentiality, integrity, and availability on the affected device and potentially impact downstream serial-attached devices.
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Analysis
by VulDB Data Team • 09/22/2026
The vulnerability identified in Lantronix SLC8000 firmware versions prior to 9.7.0.2, EMG8500 and EMG7500 firmware versions prior to 9.7.0.1, and all firmware versions of SLB882, SLCx-03, and SLCx-02 devices represents a critical command injection flaw within the device management interface. This security defect is rooted in improper neutralization of special elements used in an operating system command, commonly classified under CWE-78: Improper Neutralization of Special Elements used in an OS Command. The core technical failure occurs when the set cifs password functionality processes user-supplied input without adequate sanitization or validation before passing it to a system() call within the underlying operating environment. This architectural oversight allows any authenticated actor possessing services permissions to inject arbitrary shell commands directly into the device's execution context, bypassing intended security controls and gaining elevated privileges equivalent to root access.
From an operational perspective, this vulnerability enables attackers with relatively low-level authentication credentials to escalate their privilege level significantly. By exploiting the unsanitized parameter in the set cifs password command, malicious actors can execute arbitrary commands as the root user on the affected device. This capability results in a complete compromise of the CIA triad for the targeted hardware. Confidentiality is breached as attackers can access sensitive configuration data and network credentials stored within the device's file system. Integrity is compromised because an attacker can modify firmware settings, alter logging mechanisms to hide their presence, or change network configurations to redirect traffic through malicious intermediaries. Availability is severely impacted since the attacker can execute commands that crash services, delete critical files, or otherwise render the device inoperable, thereby disrupting any dependent processes or networks relying on this hardware for connectivity and management functions.
The impact extends beyond the immediate host device due to the nature of Lantronix products as serial-to-Ethernet gateways often used in industrial control systems and IoT deployments. A compromised gateway can serve as a pivot point for lateral movement within a network, allowing attackers to access downstream serial-attached devices that may have even weaker security postures or no direct internet exposure. This scenario aligns with ATT&CK techniques related to Command and Scripting Interpreter abuse, specifically the execution of system commands via injection vectors such as CWE-78. The ability to execute code remotely after authentication places this vulnerability in a high-severity category within threat modeling frameworks, particularly for environments where these devices manage critical infrastructure or sensitive data transmission channels.
Mitigation strategies must prioritize immediate firmware updates to address the root cause of the input validation failure. For SLC8000 units, administrators should upgrade to firmware version 9.7.0.2 or later. Similarly, EMG8500 and EMG7500 devices require an update to version 9.7.0.1 or newer. Devices running SLB882, SLCx-03, or SLCx-02 firmware must be updated to the latest available release provided by Lantronix, as all previous versions are susceptible due to the persistent nature of this flaw in those specific product lines. In environments where immediate patching is not feasible, network segmentation should be enforced to restrict access to these devices from untrusted networks. Additionally, implementing strict role-based access control policies can limit which users possess services permissions, thereby reducing the attack surface available for exploitation until a permanent software fix is deployed. Regular auditing of administrative accounts and monitoring for unusual command execution patterns in device logs can also aid in early detection of potential exploitation attempts.