CVE-2026-80152 in SLC8000
Summary
by MITRE • 09/22/2026
Lantronix SLC8000 before firmware v9.7.0.3, 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 script schedule 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 described constitutes a critical command injection flaw affecting specific firmware versions of Lantronix industrial networking hardware, including the SLC8000 prior to version 9.7.0.3, the EMG8500 and EMG7500 prior to version 9.7.0.1, as well as all existing firmware releases for the SLB882, SLCx-03, and SLCx-02 models. This security defect is rooted in improper neutralization of special elements used in an operating system command, a classification that aligns directly with CWE-78 within the Common Weakness Enumeration framework. The core technical mechanism involves the set script schedule command, which processes user-supplied input without adequate sanitization or validation before passing it to a system() call. This architectural oversight allows any authenticated attacker possessing services permissions to inject arbitrary shell commands into the execution context of the device.
From an operational perspective, the impact of this vulnerability is severe due to the privilege level at which the injected code executes. Because the vulnerable command runs with root privileges, successful exploitation grants the attacker complete control over the affected device. This results in a total loss of confidentiality, integrity, and availability for the target system. The attacker can read sensitive configuration data, modify or delete critical files, install persistent backdoors, or disrupt network services entirely. Furthermore, because these devices often serve as gateways to serial-attached equipment in industrial environments, the compromise extends beyond the immediate device. An adversary leveraging this vulnerability can potentially manipulate downstream serial-connected hardware, leading to broader operational disruptions within an Industrial Control System or IoT deployment.
The attack vector requires authentication and specific permissions, which places it under the ATT&CK technique of Command and Scripting Interpreter via User Interface Input, specifically categorized as T1059.004 with a prerequisite of valid credentials. This requirement for services permission means that while the vulnerability is critical in terms of impact, it cannot be exploited remotely by unauthenticated actors without first obtaining legitimate access through credential theft or other initial compromise methods. However, given the high value and often static nature of industrial device passwords, this barrier should not be underestimated as a sufficient defense mechanism.
Mitigation strategies must prioritize immediate firmware updates to the specified secure versions for SLC8000, EMG8500, and EMG7500 devices. For legacy systems running SLB882 or SLCx series hardware where patching may not be immediately feasible due to compatibility constraints, network segmentation is essential. Placing these devices in isolated VLANs with strict access control lists can limit the attack surface by preventing unauthorized users from reaching the management interfaces. Additionally, enforcing multi-factor authentication and restricting services permissions to only those personnel who absolutely require it reduces the likelihood of an attacker obtaining the necessary credentials to exploit this flaw. Regular auditing of user accounts and privilege assignments is recommended to ensure that no unnecessary elevated access rights are granted within the network infrastructure.