CVE-2026-77057 in Black
Summary
by MITRE • 10/26/2026
boneIO Black does not limit authentication attempts on its web interface (POST /api/login) or SSH service, and does not enforce password complexity. An unauthenticated remote attacker can make unlimited brute-force login attempts, potentially compromising user accounts and gaining unauthorized access to the device.
This issue was fixed in version 1.6.0: web login attempts are rate-limited per source address and per account, panel passwords must be at least 8 characters long, and SSH allows three authentication attempts per connection with a shortened login grace time.
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Analysis
by VulDB Data Team • 10/26/2026
The boneIO Black device suffers from critical weaknesses in its authentication mechanisms across both its web interface and Secure Shell service, creating significant opportunities for unauthorized access through brute-force attacks. The absence of rate limiting on the POST /api/login endpoint allows an unauthenticated remote attacker to submit login credentials without restriction, while the SSH daemon similarly lacks adequate controls to prevent repeated connection attempts or rapid credential guessing. This deficiency is compounded by a lack of enforced password complexity requirements, meaning that even if authentication were partially secured against volume-based attacks, individual accounts would likely rely on weak, easily guessable passwords rather than robust cryptographic secrets.
From a technical perspective, the vulnerability stems from missing input validation and state management controls within the application logic handling user sessions. For the web interface, there is no mechanism to track or throttle requests originating from specific source IP addresses or targeting particular usernames, which violates fundamental principles of secure session management. Similarly, the SSH service configuration fails to implement connection-level throttling or reduce the grace period for authentication, allowing attackers ample time and volume to attempt dictionary-based attacks against exposed services. These flaws align directly with CWE-307 Improper Restriction of Excessive Authentication Attempts and CWE-521 Weak Password Requirements, indicating systemic failures in implementing basic security hygiene standards.
The operational impact of these vulnerabilities is severe, as they enable an unauthenticated remote attacker to compromise user accounts through sustained brute-force efforts. Once valid credentials are obtained via this method, the attacker gains unauthorized access to the device, potentially leading to full system control depending on the privilege level associated with the compromised account. This scenario maps closely to MITRE ATT&CK technique T1110 Brute Force and T1078 Valid Accounts, illustrating how attackers can leverage weak authentication controls to establish persistent footholds within a network infrastructure. The ability to bypass security measures without detection further exacerbates the risk, as such activity may go unnoticed by standard monitoring tools that rely on anomaly-based detection rather than explicit rate-limiting alerts.
To mitigate these risks, it is essential to implement comprehensive access control strategies that address both volume and complexity aspects of authentication. As demonstrated in version 1.6.0 of the software, effective remediation involves enforcing strict rate limiting per source IP address and per account for web-based logins, ensuring that excessive attempts trigger temporary blocks or alerts. Additionally, SSH configurations should be hardened by restricting the number of allowed authentication attempts per connection to a minimal threshold, such as three, while simultaneously reducing the login grace time to limit exposure windows. Enforcing minimum password length requirements, ideally eight characters or more, combined with complexity rules including mixed case and special characters, significantly raises the barrier for successful brute-force attacks. Organizations should also consider deploying multi-factor authentication where possible and regularly auditing access logs for suspicious activity patterns indicative of ongoing exploitation attempts.