CVE-2026-11737 in RAX20
Summary
by MITRE • 08/11/2026
Insufficient input validation vulnerability in the listed NETGEAR models allows authenticated administrators connected to the local network to make unauthorized modification to the device software and functionality.
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Analysis
by VulDB Data Team • 08/11/2026
This vulnerability represents a critical security flaw in multiple NETGEAR networking devices that stems from inadequate input validation mechanisms within the device management interface. The issue affects various models across NETGEAR's product line and specifically targets authenticated administrators who are already connected to the local network, creating a dangerous privilege escalation scenario where legitimate users can exploit the system to gain unauthorized control over device operations. The vulnerability falls under the CWE-20 category of "Improper Input Validation" which is a fundamental weakness in software design that allows malicious inputs to bypass security checks and manipulate system behavior.
The technical implementation of this flaw occurs when authenticated administrators interact with the device's configuration interfaces, where input parameters are not properly sanitized or validated before being processed by the underlying system. This insufficient validation creates opportunities for attackers to inject malformed data or commands that can alter device firmware, modify network configurations, or disable security features entirely. The vulnerability is particularly concerning because it requires only local network access and authentication privileges, meaning that an attacker who has already gained administrative credentials within the local network can exploit this weakness to escalate their privileges further. Attackers could potentially manipulate device settings to redirect traffic, disable security protocols, or even install malicious firmware versions that persist across reboots.
The operational impact of this vulnerability extends beyond simple configuration changes and can severely compromise network security posture. When exploited, the vulnerability allows attackers to modify device software functionality in ways that can disrupt network operations, create backdoors for future attacks, or enable persistent access to the compromised network segment. The local network requirement means that physical or network proximity is necessary for exploitation, but this also implies that once an attacker gains administrative access within the local network, they can leverage this vulnerability to maintain long-term control over affected devices. This type of vulnerability aligns with ATT&CK technique T1068 which describes "Exploitation for Privilege Escalation" and T1566 which covers "Phishing for Information" as attackers may use this weakness to establish persistent access after initial compromise.
Mitigation strategies should focus on implementing robust input validation mechanisms at all levels of the application stack, including proper sanitization of user inputs before processing and verification of all configuration changes against expected parameters. Network segmentation and access controls should be implemented to limit administrative access to only necessary personnel, while regular firmware updates from NETGEAR should be deployed immediately upon availability. The vulnerability also highlights the importance of principle of least privilege implementation where administrative functions are restricted to only those parameters necessary for legitimate operations. Organizations should also implement network monitoring solutions that can detect anomalous configuration changes and unusual traffic patterns that might indicate exploitation attempts, while maintaining regular security assessments to identify similar weaknesses in other network infrastructure components.