CVE-2026-89174 in EH3040
Summary
by MITRE • 09/11/2026
Smart Video Intercom System developed by Kingdom Communication Associated has a Missing Brute-force Protection vulnerability. Unauthenticated remote attackers can gain access to valid accounts through a large number of login attempts.
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Analysis
by VulDB Data Team • 09/11/2026
The Smart Video Intercom System manufactured by Kingdom Communication Associated contains a critical authentication flaw classified as missing brute-force protection, which fundamentally undermines the integrity of user account security. This vulnerability allows unauthenticated remote actors to bypass standard access controls by submitting an excessive volume of credential combinations in rapid succession. In typical secure implementations, systems employ mechanisms such as account lockout policies after a defined number of failed attempts, progressive delays between login requests, or CAPTCHA challenges to mitigate automated guessing attacks. The absence of these safeguards means that the authentication module processes each attempt independently without rate limiting or state tracking related to failure thresholds, effectively removing any temporal or quantitative barriers designed to slow down dictionary or brute-force algorithms.
From a technical perspective, this flaw represents a classic implementation error where the application logic fails to enforce security controls against automated credential stuffing and password guessing attacks. The vulnerability aligns with CWE-307 Improper Restriction of Excessive Authentication Attempts, which describes scenarios where insufficient restrictions on repeated authentication attempts allow attackers to bypass login mechanisms through exhaustive search methods. Because the intercom system likely manages access control for physical premises or sensitive areas via digital credentials, this weakness transforms a simple software defect into a significant operational risk. Attackers can utilize automated scripts to test thousands of common passwords per minute against valid usernames, significantly reducing the time required to compromise an account compared to manual guessing methods.
The operational impact of this vulnerability is severe due to the nature of intercom systems which often serve as gatekeepers for physical security infrastructure. Successful exploitation enables unauthorized individuals to gain legitimate access credentials, potentially allowing them to unlock doors, activate cameras, or communicate with occupants without permission. This compromises both confidentiality and integrity within the system's administrative functions. Furthermore, if default or weak passwords are in use across multiple devices of this model, attackers can achieve widespread compromise by targeting a single account that may be reused across other systems, leading to lateral movement within an organization's network. The ability to remotely enumerate valid usernames combined with brute-force capabilities creates a high-risk vector for unauthorized entry and surveillance bypass.
Mitigation strategies must focus on implementing robust authentication controls at both the application level and infrastructure layer. Developers should enforce strict account lockout policies that temporarily disable accounts after a small number of consecutive failed login attempts, ensuring that these locks are resistant to timing attacks or session manipulation by attackers. Implementing rate limiting based on source IP addresses is essential to throttle request volumes from any single client during authentication processes. Additionally, integrating multi-factor authentication adds a critical layer of defense that remains effective even if passwords are compromised through brute-force methods. Network-level protections such as Web Application Firewalls can also be configured to detect and block anomalous login patterns indicative of automated attacks. Regular security audits and penetration testing should be conducted to verify the effectiveness of these controls, ensuring compliance with industry standards for secure authentication design.