CVE-2026-21080 in Smart Switch
Summary
by MITRE • 08/10/2026
Cleartext storage of sensitive information in Smart Switch prior to version 3.7.72.6 allows adjacent attackers to access sensitive data.
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Analysis
by VulDB Data Team • 08/10/2026
This vulnerability represents a critical security flaw in the Smart Switch device firmware where sensitive information is stored in cleartext format rather than being properly encrypted or obfuscated. The issue affects devices running firmware versions prior to 3.7.72.6, creating a persistent security risk that can be exploited by adjacent attackers who have physical or network proximity to the affected system. The cleartext storage of sensitive data violates fundamental security principles and creates multiple attack vectors for threat actors seeking unauthorized access to confidential information.
The technical implementation flaw stems from improper data handling practices within the Smart Switch firmware architecture, where authentication credentials, configuration parameters, or other sensitive operational data are written to persistent storage without adequate encryption mechanisms. This vulnerability falls under the CWE-312 category of "Cleartext Storage of Sensitive Information" and represents a direct violation of security best practices outlined in various industry standards including NIST SP 800-53 and ISO/IEC 27001. The flaw creates a situation where any attacker with access to the device storage can directly read sensitive information without requiring additional cryptographic attacks or complex exploitation techniques.
The operational impact of this vulnerability extends beyond simple credential theft, as adjacent attackers can potentially gain unauthorized access to network configurations, user authentication details, and other confidential data stored within the device memory. This exposure creates a significant risk for network security, particularly in environments where Smart Switch devices are deployed in sensitive locations such as corporate networks, industrial control systems, or critical infrastructure. The vulnerability enables attackers to escalate privileges, conduct lateral movement, or establish persistent access points within the network, making it a high-value target for both opportunistic and targeted attacks.
Mitigation strategies should focus on immediate firmware updates to version 3.7.72.6 or later, which addresses the cleartext storage issue through proper encryption mechanisms. Organizations should also implement network segmentation to limit adjacent access to critical devices, employ additional monitoring controls to detect unauthorized physical access attempts, and conduct comprehensive security assessments of all networked devices to identify similar vulnerabilities. The ATT&CK framework categorizes this type of vulnerability under T1566 "Phishing" and T1071.004 "Application Layer Protocol: DNS" when attackers leverage such information for further attacks, making it essential for security teams to understand both the immediate threat and potential long-term consequences of unencrypted sensitive data storage in network infrastructure devices.