CVE-2026-20764 in XWEB 300D PRO
Summary
by MITRE • 02/27/2026
An OS command injection vulnerability exists in XWEB Pro version 1.12.1 and prior, enabling an authenticated attacker to achieve remote code execution on the system by providing malicious input via the device hostname configuration which is later processed during system setup, resulting in remote code execution.
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Analysis
by VulDB Data Team • 03/01/2026
The vulnerability identified as CVE-2026-20764 represents a critical operating system command injection flaw within XWEB Pro version 1.12.1 and earlier iterations. This security weakness resides in the system's handling of device hostname configuration inputs during the system setup process, creating an exploitable entry point for authenticated attackers. The vulnerability stems from inadequate input validation and sanitization mechanisms that fail to properly escape or filter user-supplied data before it is processed by underlying operating system commands. The flaw allows an attacker with valid credentials to inject malicious commands that execute with the privileges of the affected system, potentially leading to complete system compromise.
The technical exploitation of this vulnerability follows a classic command injection pattern where attacker-controlled input flows directly into system execution contexts. When administrators configure device hostnames through the web interface or configuration management tools, the input undergoes insufficient validation before being incorporated into shell commands or system calls. This failure creates a pathway for attackers to append malicious commands to legitimate hostname values, effectively bypassing normal access controls and executing arbitrary code on the target system. The vulnerability manifests as a direct consequence of improper input handling practices and violates fundamental security principles of input sanitization and command construction.
Operationally, this vulnerability presents a significant risk to organizations relying on XWEB Pro systems, as it enables authenticated remote code execution without requiring additional attack vectors or privilege escalation techniques. The impact extends beyond simple command execution to encompass potential data exfiltration, system reconnaissance, and lateral movement within network environments. Attackers can leverage this vulnerability to establish persistent access, deploy malware, or manipulate system configurations to maintain control over compromised assets. The authenticated nature of the attack reduces the attack surface complexity but still represents a critical weakness since legitimate administrative credentials are typically required for exploitation, making it particularly dangerous in environments where credential compromise occurs.
Mitigation strategies for CVE-2026-20764 should prioritize immediate software updates to versions that address the input validation deficiencies in hostname configuration handling. Organizations must implement robust input validation mechanisms that sanitize all user-supplied data before processing, including the enforcement of strict hostname format validation and the implementation of proper command escaping techniques. Network segmentation and access control measures should be reinforced to limit the potential impact of credential compromise, while monitoring systems should be configured to detect anomalous hostname changes or unusual command execution patterns. Additionally, implementing principle of least privilege access controls and regular security audits of configuration management processes can help reduce the overall risk exposure associated with this vulnerability. This weakness aligns with CWE-77 and CWE-89 categories related to command injection and improper input handling, and represents a technique commonly documented in ATT&CK framework under T1059 for command and scripting interpreter.