CVE-2023-38862 in CF-XR11
Summary
by MITRE • 08/15/2023
An issue in COMFAST CF-XR11 v.2.7.2 allows an attacker to execute arbitrary code via the destination parameter of sub_431F64 function in bin/webmgnt.
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Analysis
by VulDB Data Team • 01/20/2026
The vulnerability identified as CVE-2023-38862 resides within the COMFAST CF-XR11 v.2.7.2 wireless router firmware, representing a critical code execution flaw that could enable remote attackers to gain unauthorized control over affected devices. This issue manifests through the destination parameter within the sub_431F64 function located in the bin/webmgnt binary component of the router's web management interface. The flaw demonstrates characteristics consistent with a command injection vulnerability, where untrusted input from the destination parameter is improperly handled and subsequently processed without adequate sanitization or validation mechanisms.
The technical implementation of this vulnerability stems from insufficient input validation within the web management interface's processing logic. When an attacker submits malicious input through the destination parameter, the system fails to properly sanitize or escape the data before incorporating it into system commands or shell operations. This primitive allows for arbitrary code execution on the underlying operating system, potentially enabling full compromise of the router's functionality. The vulnerability specifically affects the web management interface's handling of user-supplied parameters, making it accessible through standard web browser interactions without requiring specialized tools or elevated privileges.
The operational impact of this vulnerability extends beyond simple unauthorized access, as it provides attackers with complete control over the affected router's network functions and configuration parameters. Successful exploitation could enable attackers to modify network settings, redirect traffic, establish backdoors, or use the device as a pivot point for attacking internal network resources. This represents a significant risk for enterprise and residential networks that rely on these devices for internet connectivity, as compromised routers can serve as entry points for broader network infiltration attempts. The vulnerability affects the device's web management interface, making it particularly dangerous as it can be exploited through standard web browser interactions without requiring specialized knowledge or tools.
Security professionals should note this vulnerability aligns with CWE-77 and CWE-78 categories, which specifically address command injection flaws in software systems. The ATT&CK framework would categorize this as a privilege escalation and persistence technique, potentially enabling attackers to establish long-term access to network infrastructure. Mitigation strategies should include immediate firmware updates from COMFAST, network segmentation to limit access to affected devices, and implementation of intrusion detection systems to monitor for exploitation attempts. Organizations should also consider disabling unnecessary web management interfaces and implementing strict access controls to reduce the attack surface. The vulnerability demonstrates the critical importance of input validation in network infrastructure devices and highlights the need for comprehensive security testing of embedded systems before deployment in production environments.