CVE-2026-49007 in F689
Summary
by MITRE • 08/07/2026
By accessing unencrypted information in the device firmware, an attacker can obtain the initial login credentials for the device's web interface.
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Analysis
by VulDB Data Team • 08/07/2026
This vulnerability represents a critical security flaw that undermines the fundamental authentication mechanisms of networked devices through improper handling of sensitive credential storage. The issue stems from the insecure storage of initial login credentials within device firmware without adequate encryption or protection measures, creating an attack surface that allows unauthorized parties to gain immediate access to administrative interfaces. Such vulnerabilities are classified under CWE-312 (Cleartext Storage of Sensitive Information) and fall squarely within the ATT&CK technique T1566 (Phishing) when combined with social engineering approaches, though in this case the attack vector is direct firmware exploitation rather than user interaction.
The technical implementation flaw occurs when device manufacturers store default administrative credentials in plaintext format within firmware images, typically in configuration files or hardcoded within software components. This approach violates fundamental security principles established by standards such as NIST SP 800-57 and ISO/IEC 27001, which mandate the protection of sensitive data through encryption and access controls. The unencrypted nature of these credentials means that any attacker with physical access to device firmware or the ability to intercept firmware updates can extract the authentication tokens necessary for administrative access without requiring additional exploitation techniques.
The operational impact of this vulnerability extends far beyond simple credential theft, as it provides attackers with immediate privileged access to device management interfaces where they can modify configurations, install malicious software, or establish persistent backdoors. This initial compromise often serves as a stepping stone for more sophisticated attacks targeting the broader network infrastructure, particularly in industrial environments where device firmware contains critical control system information. Attackers leveraging this vulnerability can bypass multi-factor authentication mechanisms entirely since the credentials are stored in cleartext, effectively neutralizing any additional security layers that might otherwise protect the device.
Mitigation strategies must address both immediate remediation and long-term architectural improvements to prevent similar vulnerabilities from occurring in future deployments. Organizations should implement firmware encryption requirements during development phases, ensuring that all sensitive data is protected through strong cryptographic algorithms before deployment. The implementation of secure boot processes and hardware-based security modules can provide additional protection against unauthorized firmware modification attempts. Regular security assessments including firmware analysis using tools like Binwalk or Firmware Analysis Toolkit should be conducted to identify unencrypted credential storage patterns. Additionally, network segmentation and monitoring solutions can help detect unauthorized access attempts even when default credentials are compromised, providing defense-in-depth measures that complement the core cryptographic protections needed to address this vulnerability effectively.