CVE-2026-59764 in Wireless LAN Router
Summary
by MITRE • 07/28/2026
ELECOM wireless LAN routers and access points devices contain an OS Command Injection vulnerability in WebUI. If this vulnerability is exploited, an arbitrary OS command may be executed by an attacker who can log in to the product.
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Analysis
by VulDB Data Team • 07/28/2026
This vulnerability represents a critical operating system command injection flaw within the web user interface of ELECOM wireless LAN routers and access points. The issue stems from insufficient input validation and sanitization mechanisms within the web management interface, allowing authenticated attackers with valid login credentials to inject malicious operating system commands directly into the device's command processing pipeline. The vulnerability exists because the application fails to properly escape or filter user-supplied input that is subsequently passed to underlying system commands without adequate security controls.
The technical execution of this vulnerability requires an attacker to possess valid authentication credentials for the device's web interface, which typically includes administrative access. Once authenticated, the attacker can manipulate input fields within the web UI to inject OS commands that will be executed with the privileges of the web application process, often running with elevated system permissions. This type of vulnerability falls under CWE-77 which specifically addresses command injection flaws where untrusted data is incorporated into operating system commands without proper sanitization or validation.
From an operational impact perspective, successful exploitation of this vulnerability enables attackers to execute arbitrary code on the affected devices, potentially leading to complete system compromise. Attackers could gain access to network traffic interception capabilities, modify device configurations, establish persistent backdoors, or use the compromised devices as launching points for further attacks within the local network. The vulnerability particularly affects wireless infrastructure devices that are often deployed in enterprise and residential environments where they serve as critical network entry points and may control access to sensitive network resources.
The attack surface is significantly reduced by the requirement for valid authentication credentials, but this does not mitigate the severity of potential impact once exploitation occurs. This vulnerability aligns with ATT&CK technique T1059.001 which covers command and scripting interpreter execution, and T1078 which addresses valid accounts as a means of gaining access to systems. Organizations should implement immediate mitigations including enforcing strong authentication controls, implementing network segmentation, regularly updating firmware versions, and monitoring for unusual command execution patterns within network devices.
Security best practices recommend deploying network access control measures such as multi-factor authentication, restricting web interface access to trusted networks only, and conducting regular security assessments of network infrastructure. Device vendors should prioritize patching this vulnerability through secure firmware updates while organizations must validate that their network devices are running patched versions and establish monitoring procedures to detect potential exploitation attempts. The vulnerability demonstrates the critical importance of input validation in web applications and highlights how even authenticated access can lead to complete system compromise when proper security controls are absent.