CVE-2023-48810 in X6000R
Summary
by MITRE • 11/30/2023
In TOTOLINK X6000R V9.4.0cu.852_B20230719, the shttpd file, sub_4119A0 function obtains fields from the front-end through Uci_ Set_ The Str function when passed to the CsteSystem function creates a command execution vulnerability.
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Analysis
by VulDB Data Team • 03/01/2026
The vulnerability identified as CVE-2023-48810 resides within the TOTOLINK X6000R router firmware version V9.4.0cu.852_B20230719, specifically within the shttpd web server component. This issue manifests through a command injection flaw that originates from improper input validation and handling within the software's user configuration interface. The vulnerability occurs when the sub_4119A0 function processes user-supplied data through the Uci_Set_Str function, which then passes this data to the CsteSystem function without adequate sanitization or validation measures.
The technical implementation of this vulnerability stems from a classic command injection weakness where user-controllable input flows directly into system execution contexts. The shttpd web server component handles HTTP requests from web-based administrative interfaces, and when users interact with certain configuration parameters, the input data bypasses proper security controls. The Uci_Set_Str function acts as an intermediary that accepts user input and subsequently passes it to the CsteSystem function, which appears to execute system commands directly. This represents a dangerous pattern of insecure data handling where untrusted input is not properly escaped or validated before being used in system-level operations.
The operational impact of this vulnerability is severe and potentially catastrophic for affected networks. An attacker who can successfully exploit this command injection flaw could execute arbitrary commands on the router with the privileges of the web server process, typically running as root or a highly privileged user. This would allow for complete system compromise, enabling attackers to install malware, modify network configurations, create backdoor access, or exfiltrate sensitive data from the device. The vulnerability affects the router's administrative interface, making it accessible through standard web browser interactions, which means exploitation could occur remotely without requiring physical access to the device. This makes the vulnerability particularly dangerous in enterprise and home network environments where routers serve as critical network infrastructure components.
Security professionals should note this vulnerability aligns with CWE-78, which describes improper neutralization of special elements used in OS commands, and maps to attack techniques in the MITRE ATT&CK framework under T1059.001 for Command and Scripting Interpreter. The risk assessment indicates this vulnerability should be prioritized for immediate remediation, as it provides attackers with complete system control. Organizations should implement immediate mitigations including firmware updates from TOTOLINK, network segmentation to isolate affected devices, and monitoring for suspicious network activity. Additionally, the vulnerability demonstrates the critical importance of input validation and proper sanitization of user data in web applications, particularly those interfacing with system-level functions. The attack surface is broad since the vulnerability affects the web administrative interface, making it accessible to anyone with network access and potentially to automated scanning tools that can identify and exploit such flaws.