CVE-2025-6522 in Sight Bulb Pro
Summary
by MITRE • 06/27/2025
Unauthenticated users on an adjacent network with the Sight Bulb Pro can run shell commands as root through a vulnerable proprietary TCP protocol available on Port 16668. This vulnerability allows an attacker to run arbitrary commands on the Sight Bulb Pro by passing a well formed JSON string.
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Analysis
by VulDB Data Team • 08/07/2026
This vulnerability represents a critical remote code execution flaw in the Sight Bulb Pro device that stems from improper input validation within its proprietary TCP protocol implementation. The device exposes a service on port 16668 that accepts JSON formatted commands without adequate authentication mechanisms, creating an attack surface where unauthenticated adversaries on adjacent networks can gain full root privileges. The vulnerability architecture indicates a classic command injection flaw where the system processes user-supplied JSON data directly without sanitization or proper validation, allowing malicious payloads to be interpreted as shell commands.
The technical exploitation pathway demonstrates a fundamental security failure in input handling and privilege management within the device's proprietary protocol stack. When an attacker sends a specially crafted JSON string through the TCP connection on port 16668, the system processes this data without verifying the sender's authenticity or validating the content structure. This primitive allows for arbitrary command execution at the highest privilege level, effectively providing complete system compromise to any network neighbor capable of reaching the device. The vulnerability aligns with CWE-77 and CWE-20 categories, specifically addressing improper input validation leading to command injection vulnerabilities that enable unauthorized privilege escalation.
The operational impact of this vulnerability extends beyond simple remote code execution to encompass complete system takeover capabilities that can affect device availability, data integrity, and network security posture. An attacker exploiting this vulnerability can modify device configurations, extract sensitive information, establish persistent backdoors, or use the compromised device as a launch point for further network attacks. The adjacent network requirement reduces the attack surface compared to internet-facing vulnerabilities but still poses significant risk given that many IoT devices operate within untrusted network segments. This flaw directly maps to attack techniques documented in the MITRE ATT&CK framework under T1203 (Exploitation for Execution) and T1566 (Phishing for Information) categories, where adversaries leverage unauthenticated access to gain system-level control.
Mitigation strategies must address both immediate defensive measures and long-term architectural improvements. Immediate actions include implementing network segmentation to isolate the Sight Bulb Pro from untrusted networks, disabling unnecessary services on port 16668 when not required, and applying network access controls to restrict connections to authorized IP addresses only. The device manufacturer should implement proper authentication mechanisms before accepting any JSON commands, employ input validation with strict schema checking, and ensure privilege separation between the network service and system execution components. Security monitoring should be enhanced to detect unusual command patterns or unauthorized access attempts on the vulnerable port. Additionally, regular security assessments should be conducted to identify similar vulnerabilities in proprietary protocols and ensure proper security-by-design principles are implemented throughout the device lifecycle, including adherence to NIST SP 800-30 risk assessment standards for IoT security considerations.