CVE-2026-76133 in NA111-M
Summary
by MITRE • 08/31/2026
The affected Ebyte
product uses a deprecated hashing algorithm in an authentication-related operation. Under conditions where an attacker can manipulate or predict the authentication exchange, the weak construction may reduce the assurance provided by the authentication mechanism and facilitate unauthorized access.
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Analysis
by VulDB Data Team • 08/31/2026
The identified vulnerability resides within an Ebyte product that relies on a deprecated hashing algorithm to secure authentication-related operations. This architectural flaw represents a fundamental weakness in the cryptographic implementation, where the integrity of user verification processes is compromised due to the use of outdated security primitives. In modern cybersecurity frameworks, such as those defined by the Common Weakness Enumeration (CWE), this issue aligns closely with CWE-327, which categorizes the use of broken or risky cryptography. Specifically, it may also relate to CWE-698 if the deprecated algorithm is being used in a context where its known mathematical weaknesses can be exploited to reverse-engineer credentials or bypass verification checks entirely. The reliance on legacy hashing mechanisms indicates that the software development lifecycle did not adequately enforce current cryptographic standards during design and implementation phases.
From an operational perspective, this vulnerability significantly diminishes the assurance provided by the authentication mechanism. Authentication systems are designed to verify the identity of users or devices before granting access to protected resources. When a weak hash function is employed, particularly one that has been deprecated due to collisions or pre-image attacks becoming feasible with modern computing power, the system becomes susceptible to various attack vectors. An attacker who can manipulate or predict elements of the authentication exchange may exploit these weaknesses to generate valid hashes without possessing the correct credentials. This capability effectively neutralizes the security boundary established by the login process, allowing for unauthorized access to sensitive data and functionalities that should remain restricted to authenticated entities.
The impact extends beyond simple credential theft. If an attacker can successfully forge or predict authentication tokens using this weak hashing algorithm, they may achieve privilege escalation within the system. This could lead to a complete compromise of the affected Ebyte product's confidentiality, integrity, and availability. In industrial IoT contexts where such devices are often deployed, unauthorized access might allow for remote control of physical processes, manipulation of sensor data, or disruption of critical infrastructure services. The ATT&CK framework classifies this type of exploitation under techniques related to Credential Access, specifically those involving password cracking or hash extraction if the underlying hashes are exposed, and potentially Defense Evasion if the attacker uses these forged credentials to blend in with legitimate traffic patterns undetected by security monitoring tools.
Mitigating this vulnerability requires a multi-faceted approach focused on cryptographic modernization and enhanced input validation. The primary remediation step is to replace the deprecated hashing algorithm with a robust, industry-standard alternative such as SHA-256 or higher, preferably within a secure key derivation function like PBKDF2, scrypt, or Argon2 for password storage. This ensures that even if hash values are intercepted, they cannot be easily reversed or collided against to gain access. Additionally, developers should implement strict input validation and sanitization routines to prevent attackers from manipulating the authentication exchange parameters. Implementing rate limiting on login attempts can further mitigate brute-force attacks that might leverage these weaknesses. Regular security audits and code reviews focusing on cryptographic implementations are essential to ensure compliance with current standards such as NIST SP 800-132, which provides guidelines for deriving keys and storing passwords securely.