CVE-2026-114220 in NT OneAPP
Summary
by MITRE • 10/23/2026
NT OneAPP developed by NewType Infortech has an Improper Certificate Validation vulnerability. Unauthenticated network-adjacent attackers can perform a man-in-the-middle attack by failing to validate the server certificate and the hostname, thereby intercepting or modifying communications between the application and the server.
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Analysis
by VulDB Data Team • 10/23/2026
The vulnerability identified in NT OneAPP, developed by NewType Infortech, represents a critical failure in cryptographic implementation known as Improper Certificate Validation. This flaw allows unauthenticated network-adjacent attackers to execute man-in-the-middle attacks by bypassing essential security checks during the transport layer communication process. The core technical deficiency lies in the application's handling of Secure Sockets Layer or Transport Layer Security handshakes, where the client fails to rigorously verify the authenticity and integrity of the server's digital certificate. Specifically, the software does not validate that the presented certificate is signed by a trusted Certificate Authority nor does it confirm that the hostname requested matches the Common Name or Subject Alternative Names present in the certificate. This omission effectively nullifies the security guarantees provided by public key infrastructure, leaving data transmissions exposed to interception and alteration.
From an operational perspective, this vulnerability enables attackers positioned within the same network segment or capable of intercepting traffic between the client and server to compromise confidentiality and integrity without requiring valid credentials. By exploiting the lack of hostname validation and certificate chain verification, an attacker can present a self-signed or maliciously obtained certificate that appears valid to the vulnerable application. Once established, this intermediary position allows for the passive eavesdropping on sensitive data such as login credentials, personal identifiable information, or proprietary business logic transmitted over the connection. Furthermore, it permits active modification of the communication stream, where an attacker can inject malicious payloads, alter transaction details, or redirect users to phishing sites while maintaining the appearance of a secure session from the user's perspective.
This type of vulnerability is formally categorized under CWE-295: Improper Certificate Validation and aligns with ATT&CK technique T1078: Valid Accounts when used in conjunction with credential harvesting, as well as MITM techniques that rely on certificate spoofing. The absence of strict validation mechanisms violates fundamental principles outlined in industry standards such as NIST SP 800-52 for TLS implementation and OWASP guidelines regarding secure communication channels. Such failures are particularly dangerous because they undermine the trust model upon which encrypted communications are built, allowing attackers to bypass encryption entirely by convincing the client that a malicious endpoint is legitimate.
To mitigate this risk, developers must implement strict certificate pinning or enforce standard PKI validation procedures where every step of the certificate chain is verified against trusted root authorities. It is imperative to ensure that hostname verification algorithms correctly compare the requested domain with all identifiers present in the server's certificate, including both Common Name and Subject Alternative Names fields. Additionally, applications should reject certificates that are expired, revoked, or self-signed unless explicitly configured for development environments only. Regular security audits focusing on cryptographic implementations and penetration testing using tools designed to simulate man-in-the-middle scenarios can help identify these gaps before deployment in production environments.