CVE-2026-15428 in Archer VX800v
Summary
by MITRE • 07/14/2026
An OS command injection vulnerability exists in Archer VX800v v1 due to insufficient input sanitization of the domain name parameter. An adjacent attacker who can access the relevant HTTP interface can modify the parameter to inject shell metacharacters, resulting in arbitrary code execution with root privileges.
Successful exploitation may allow remote code execution and complete compromise of the device.
If you want to get best quality of vulnerability data, you may have to visit VulDB.
Analysis
by VulDB Data Team • 07/15/2026
The Archer VX800v v1 router presents a critical operating system command injection vulnerability that stems from inadequate input validation mechanisms within its web interface. This flaw resides in the domain name parameter processing, where the device fails to properly sanitize user-supplied input before incorporating it into system commands. The vulnerability affects devices running version 1 of the Archer VX800v firmware and represents a fundamental breakdown in the application's security architecture that directly violates established secure coding practices.
The technical exploitation of this vulnerability occurs when an attacker with network access to the device's HTTP interface manipulates the domain name parameter to include shell metacharacters such as semicolons, ampersands, or backticks. These characters allow the attacker to append additional commands that execute within the router's operating system context. The injection occurs because the application directly concatenates user input into command strings without proper escaping or validation, creating a classic command injection vector that aligns with CWE-77 and CWE-88 classifications.
This vulnerability operates at the network level where adjacent attackers can leverage their access to the HTTP interface to craft malicious requests. The attack surface is particularly concerning as it requires minimal privileges for exploitation since the device processes the injected commands with root-level privileges by design. Successful exploitation results in complete system compromise, enabling attackers to execute arbitrary code, modify system configurations, install persistent backdoors, and gain full administrative control over the device's network functions.
The operational impact of this vulnerability extends beyond simple remote code execution to encompass complete network infrastructure compromise. Attackers can leverage the compromised device as a pivot point for further network reconnaissance and lateral movement attacks against connected systems. This aligns with attack patterns documented in the MITRE ATT&CK framework under techniques such as command and control communications, privilege escalation, and persistence mechanisms. The vulnerability represents a significant risk to network security posture since routers serve as critical infrastructure components that often lack proper security monitoring and protection.
Mitigation strategies must address both immediate remediation and long-term architectural improvements. Organizations should implement input validation at multiple layers including web application firewalls, proper command parameterization using secure APIs, and regular firmware updates from the vendor. Network segmentation and access controls should limit exposure of administrative interfaces to trusted networks only. The vulnerability demonstrates the critical importance of following secure coding guidelines and implementing defense-in-depth strategies that prevent similar flaws from occurring in network infrastructure devices. Regular security assessments and penetration testing should be conducted to identify additional injection vectors and ensure proper input sanitization across all device components.