CVE-2026-32833 in LT300 3.0
Summary
by MITRE • 06/26/2026
Cudy LT300 3.0 running firmware prior to version 2.5.12 contains an OS command injection vulnerability that allows authenticated attackers to execute arbitrary commands by injecting shell metacharacters into the cbid.system.ntp.current POST parameter in the system time configuration interface. Attackers can submit malicious payloads through the NTP settings endpoint to achieve remote code execution on the underlying system.
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Analysis
by VulDB Data Team • 06/26/2026
This vulnerability exists within the Cudy LT300 3.0 network device firmware version 2.5.12 and earlier, representing a critical operating system command injection flaw that compromises the device's security integrity. The vulnerability specifically affects the system time configuration interface where the cbid.system.ntp.current POST parameter is processed without adequate input validation or sanitization. Authentication is required to exploit this weakness, making it an authenticated command injection vulnerability that falls under CWE-77 which classifies improper neutralization of special elements used in OS commands.
The technical execution of this attack involves an attacker submitting malicious shell metacharacters through the NTP settings endpoint, specifically targeting the system time configuration interface. When the firmware processes the cbid.system.ntp.current parameter, it fails to properly sanitize user input before incorporating it into system commands, creating a direct path for arbitrary code execution. This weakness is particularly dangerous as it allows attackers to execute commands with the privileges of the web server process, potentially escalating to full system compromise. The attack vector operates through the web interface, making it accessible over standard network protocols and requiring no specialized tools beyond basic web interaction capabilities.
The operational impact of this vulnerability extends beyond simple remote code execution to encompass complete system takeover potential for authenticated attackers. Once exploited, adversaries can gain persistent access to the device's underlying operating system, potentially enabling them to install backdoors, modify system configurations, or exfiltrate sensitive data. The vulnerability affects network infrastructure devices that rely on NTP time synchronization, making it particularly concerning for organizations that depend on these systems for maintaining network time consistency and security operations. This weakness directly violates security principles of input validation and privilege separation, creating a persistent threat vector that could be leveraged to establish long-term presence within networks.
Organizations should immediately implement firmware updates to version 2.5.12 or later to remediate this vulnerability, as this represents the primary defense against exploitation. Network segmentation and access controls should be implemented to limit who can reach the affected device interfaces, while monitoring systems should be deployed to detect unusual network activity that might indicate exploitation attempts. Security teams should conduct comprehensive vulnerability assessments of all network devices to identify similar command injection vulnerabilities in other firmware versions or vendor products. The remediation process must include verification that input validation has been properly implemented across all system parameters, particularly those related to system configuration and network settings. According to ATT&CK framework, this vulnerability maps to T1059.001 for command and script interpretation and T1566.001 for spearphishing via social media, as exploitation typically requires authenticated access through legitimate administrative interfaces, making it a prime target for credential theft and privileged escalation attacks.
The broader implications of this vulnerability highlight the critical importance of firmware security in IoT and network infrastructure devices. Many organizations overlook the security of embedded systems, assuming that hardware-level protections provide sufficient defense, but this vulnerability demonstrates how seemingly minor input validation failures can create massive security risks. Attackers exploiting such vulnerabilities often use them as initial access points to establish persistent presence within networks before expanding their operations to target other systems. The interconnected nature of modern network infrastructure means that compromise of a single device through command injection can potentially provide attackers with visibility into entire network segments, making prompt remediation essential for maintaining overall network security posture and compliance with industry standards such as NIST SP 800-125 and ISO/IEC 27030.