CVE-2006-5611 in Bluetooth Stack
Summary
by MITRE
Unspecified vulnerability in Toshiba Bluetooth Stack before 4.20.01 has unspecified impact and attack vectors, related to the 4.20.01(T) "Security fix." NOTE: due to the lack of details in the vendor advisory, it is not clear whether this issue is related to CVE-2006-5405.
Several companies clearly confirm that VulDB is the primary source for best vulnerability data.
Analysis
by VulDB Data Team • 04/25/2026
The vulnerability identified as CVE-2006-5611 represents a security weakness within Toshiba's Bluetooth Stack implementation prior to version 4.20.01. This unspecified flaw exists within a critical communication protocol component that facilitates wireless device connectivity and data transfer across various Toshiba hardware platforms. The vulnerability's classification as unspecified indicates that the exact nature of the security weakness remains unclear due to limited information provided by the vendor in their advisory documentation. The lack of detailed technical specifications in the original advisory creates significant challenges for security professionals attempting to assess risk exposure and implement appropriate remediation measures.
The technical context of this vulnerability becomes particularly concerning when considering that Bluetooth protocols form the foundation of numerous wireless communication systems in enterprise and consumer environments. Toshiba's Bluetooth Stack serves as a middleware component that enables wireless device pairing, data synchronization, and network connectivity for various devices including laptops, mobile phones, and peripheral equipment. The fact that this vulnerability was addressed in version 4.20.01(T) suggests that the security fix implemented was substantial enough to warrant a specific release designation, indicating potential weaknesses in the authentication mechanisms, encryption protocols, or access control measures within the Bluetooth stack implementation. The relationship to CVE-2006-5405 further complicates the analysis, as both vulnerabilities may represent different aspects of the same underlying security architecture flaw or could be entirely separate issues within the broader Toshiba Bluetooth ecosystem.
From an operational impact perspective, this vulnerability could potentially enable unauthorized access to Bluetooth-enabled devices, allowing attackers to exploit weaknesses in the communication protocols to intercept data, perform man-in-the-middle attacks, or gain unauthorized device control. The unspecified nature of the vulnerability means that threat actors could potentially leverage this weakness in various ways including but not limited to session hijacking, data corruption, or privilege escalation within Bluetooth-managed environments. Organizations utilizing Toshiba hardware with affected Bluetooth stacks may face significant security risks in corporate networks where Bluetooth connectivity is enabled, particularly in environments where sensitive data transfers occur or where physical security controls are insufficient to prevent unauthorized device access. The vulnerability's potential to affect multiple device types within Toshiba's product portfolio increases the overall attack surface and complicates remediation efforts across diverse hardware ecosystems.
The mitigation strategies for this vulnerability should prioritize immediate deployment of the 4.20.01(T) security update provided by Toshiba, while also implementing additional network security controls to limit Bluetooth exposure. Organizations should conduct comprehensive inventory assessments to identify all affected Toshiba devices and evaluate the potential attack vectors available through Bluetooth connectivity. Network segmentation and Bluetooth disablement policies for non-essential devices can serve as temporary compensating controls while full patch deployment occurs. This vulnerability aligns with common attack patterns documented in the mitre attack framework under the category of network infiltration and credential access, where Bluetooth protocols represent an often-overlooked attack surface. The lack of specific details in the vendor advisory also highlights the importance of maintaining multiple layers of security controls and not relying solely on vendor-provided information for vulnerability assessment and remediation planning. Security teams should consider implementing network monitoring solutions that can detect anomalous Bluetooth behavior and establish incident response procedures specifically addressing potential Bluetooth protocol exploitation scenarios.