CVE-2023-46993 in A3300R
Summary
by MITRE • 10/31/2023
In TOTOLINK A3300R V17.0.0cu.557_B20221024 when dealing with setLedCfg request, there is no verification for the enable parameter, which can lead to command injection.
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Analysis
by VulDB Data Team • 02/20/2026
The vulnerability identified as CVE-2023-46993 affects the TOTOLINK A3300R router firmware version 17.0.0cu.557_B20221024 and represents a critical command injection flaw within the device's web interface management functionality. This issue resides in the setLedCfg request handling mechanism where the system fails to properly validate or sanitize the enable parameter before processing it. The absence of input validation creates a pathway for malicious actors to inject arbitrary commands into the system through crafted requests. The vulnerability is particularly concerning as it targets the router's LED configuration functionality, which typically operates with elevated privileges and has direct access to underlying system commands.
The technical exploitation of this vulnerability occurs when an attacker sends a specially crafted HTTP request to the router's web management interface containing a malicious value in the enable parameter of the setLedCfg request. Without proper input validation, the system processes this unverified input directly within the command execution context, allowing attackers to inject shell commands that execute with the privileges of the web server process. This type of vulnerability falls under CWE-77 and CWE-94 categories, representing command injection and code injection respectively, and aligns with ATT&CK technique T1059.004 for command and scripting interpreter. The vulnerability is classified as a privilege escalation vector since the web interface typically operates with administrative privileges, enabling attackers to execute arbitrary code on the device.
The operational impact of this vulnerability extends beyond simple command execution, as it provides attackers with complete control over the affected router. An attacker could potentially gain persistent access to the network, redirect traffic, disable security features, or use the device as a pivot point for further attacks within the local network. The vulnerability affects the device's core functionality by compromising the integrity of the LED configuration service, which serves as a potential entry point for more sophisticated attacks. This flaw undermines the fundamental security assumptions of the device's web interface, as it allows unauthenticated or authenticated attackers to execute arbitrary commands, potentially leading to complete device compromise and network infiltration.
Mitigation strategies for CVE-2023-46993 should include immediate firmware updates from TOTOLINK to address the input validation deficiency in the setLedCfg request handling. Network administrators should implement network segmentation and access controls to limit exposure of such devices to untrusted networks. Additional protective measures include deploying web application firewalls to monitor and filter suspicious requests, implementing strict input validation rules for all parameters in the web interface, and conducting regular security assessments of network devices. The vulnerability also highlights the importance of following secure coding practices and adhering to industry standards such as OWASP Top 10 and NIST cybersecurity frameworks for preventing injection vulnerabilities. Organizations should also consider implementing intrusion detection systems to monitor for suspicious command execution patterns and establish incident response procedures to address potential exploitation attempts.