CVE-2026-32296 in NanoKVM
Summary
by MITRE • 03/17/2026
Sipeed NanoKVM before 2.3.1 exposes a Wi-Fi configuration endpoint without proper security checks, allowing an unauthenticated attacker with network access to change the saved configured Wi-Fi network to one of the attacker's choosing, or craft a request to exhaust the system memory and terminate the KVM process.
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Analysis
by VulDB Data Team • 03/21/2026
The vulnerability identified as CVE-2026-32296 affects Sipeed NanoKVM devices running firmware versions prior to 2.3.1, presenting a critical security flaw in the device's wireless configuration management system. This vulnerability resides in the Wi-Fi configuration endpoint implementation, which fails to enforce proper authentication mechanisms or access controls. The flaw allows unauthenticated attackers with network access to manipulate the device's wireless settings, potentially compromising the entire network infrastructure that the KVM device operates within.
The technical nature of this vulnerability stems from inadequate input validation and authentication checks within the Wi-Fi configuration interface. The endpoint lacks proper security measures that would normally validate user credentials or verify the integrity of requests before processing them. This design flaw enables attackers to submit crafted requests that modify the saved Wi-Fi network configuration, effectively allowing them to redirect the device to connect to attacker-controlled networks. Additionally, the vulnerability permits memory exhaustion attacks through carefully crafted requests that can cause the KVM process to terminate unexpectedly, resulting in service disruption and potential denial of access to the connected system.
The operational impact of this vulnerability extends beyond simple network configuration changes, as it provides attackers with a potential foothold for further network infiltration. The ability to redirect the device to malicious Wi-Fi networks could enable man-in-the-middle attacks, allowing attackers to intercept and manipulate data transmitted through the KVM connection. The memory exhaustion capability represents a more severe threat, as it can be used to create a denial-of-service condition that disrupts legitimate access to the connected system. This vulnerability particularly affects environments where physical security is paramount, as it could allow unauthorized individuals to gain access to systems through the KVM interface without requiring physical access to the device itself.
Security mitigations for this vulnerability should focus on implementing proper authentication mechanisms for all configuration endpoints, including the Wi-Fi configuration interface. The device firmware must be updated to version 2.3.1 or later, which contains the necessary security patches to address the exposed endpoint. Network segmentation and monitoring should be implemented to detect unauthorized configuration changes, while access controls should be enforced to ensure that only authorized personnel can modify network settings. The vulnerability aligns with CWE-284, which addresses improper access control, and can be mapped to ATT&CK technique T1071.004 for application layer protocol: DNS, as attackers could leverage the compromised device to establish unauthorized network connections. Organizations should also implement network access controls and regular security assessments to prevent similar vulnerabilities from being introduced in future deployments, while ensuring that all networked devices undergo proper security testing before deployment in critical environments.