CVE-2026-9216 in RAX30
Summary
by MITRE • 09/09/2026
An insufficient input validation vulnerability in the listed NETGEAR RAX series models allows a network-adjacent attacker having network access (such as WiFi credentials) to crash the router's management UI. There is no confidentiality or integrity impact. A crash of the router's management UI does not impact the availability of the router's core services like WiFi network.
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Analysis
by VulDB Data Team • 09/09/2026
The vulnerability identified in certain NETGEAR RAX series routers represents a classic case of insufficient input validation within the device’s web-based management interface. This flaw allows an attacker who has established network adjacency, such as possessing valid Wi-Fi credentials or being connected to the local area network, to trigger a denial-of-service condition against the administrative console. The core technical issue stems from the router's failure to properly sanitize or validate specific inputs submitted through the HTTP requests directed at the management UI endpoints. When malformed or excessively large data packets are processed by the backend services responsible for rendering the interface, they cause an unhandled exception or resource exhaustion that leads to a crash of the web server process hosting the administrative panel.
From a technical perspective, this vulnerability aligns with CWE-20 Improper Input Validation and potentially CWE-400 Uncontrolled Resource Consumption if the crash is triggered by memory allocation failures due to oversized payloads. The attack vector requires network adjacency, meaning the attacker must be on the same local subnet or have authenticated access via Wi-Fi. This classification places it within MITRE ATT&CK technique T1595 Active Scanning for Vulnerable Hosts in the context of reconnaissance, although the primary effect here is disruption rather than exploitation for code execution. The vulnerability does not involve any cross-site scripting (XSS) or remote code execution capabilities, which significantly limits its severity profile compared to other web application flaws.
The operational impact of this vulnerability is strictly limited to the availability of the management interface itself. When triggered, the router's administrative UI becomes inaccessible until it is manually rebooted or the service restarts automatically if supported by the firmware architecture. Crucially, this crash does not affect the underlying network infrastructure functions. The Wi-Fi radio continues to operate normally, allowing connected clients to maintain their internet connectivity and local network access without interruption. There is no impact on data confidentiality, as no sensitive information such as passwords or encryption keys is exposed during the crash sequence. Similarly, there is no integrity compromise because the attacker cannot modify router configurations or inject malicious traffic into the network stream through this specific flaw.
Mitigation strategies for this vulnerability primarily involve applying vendor-provided firmware updates that address the input validation logic within the management application layer. Until patches are available, administrators can reduce exposure by disabling remote management features if enabled and ensuring that only trusted devices have access to the local network segment where the router resides. Network segmentation policies should be enforced so that guest networks or untrusted IoT devices cannot reach the administrative IP address of the router. Additionally, implementing strict rate-limiting on HTTP requests directed at the management interface can help mitigate potential abuse by limiting the frequency with which malformed inputs are processed, thereby reducing the likelihood of triggering the crash condition in a sustained manner.