CVE-2026-24932 in ADM
Summary
by MITRE • 02/03/2026
The DDNS update function in ADM fails to properly validate the hostname of the DDNS server's TLS/SSL certificate. Although the connection uses HTTPS, an improper validated TLS/SSL certificates allows a remote attacker can intercept the communication to perform a Man-in-the-Middle (MitM) attack, which may obtain the sensitive information of DDNS updating process, including the user's account email, MD5 hashed password, and device serial number.This issue affects ADM: from 4.1.0 through 4.3.3.ROF1, from 5.0.0 through 5.1.1.RCI1.
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Analysis
by VulDB Data Team • 02/19/2026
The vulnerability identified as CVE-2026-24932 represents a critical security flaw in the Dynamic Domain Name System (DDNS) update functionality of ADM software, affecting versions ranging from 4.1.0 through 4.3.3.ROF1 and 5.0.0 through 5.1.1.RCI1. This issue stems from inadequate validation of TLS/SSL certificate hostnames during the DDNS update process, creating a significant attack surface that undermines the integrity of secure communications between devices and DDNS servers. The flaw manifests when the system establishes HTTPS connections for DDNS updates but fails to properly verify that the certificate presented by the server matches the expected hostname, leaving the communication channel susceptible to interception attacks.
The technical implementation of this vulnerability directly relates to CWE-295, which addresses improper certificate validation in secure communications. When ADM processes DDNS updates, it establishes secure connections using HTTPS protocols but neglects to perform proper hostname verification against the TLS/SSL certificate presented by the DDNS server. This validation failure allows attackers to perform man-in-the-middle attacks by presenting a valid certificate for a different hostname, effectively breaking the trust mechanism that should protect sensitive data exchanges. The improper certificate validation creates a scenario where network traffic can be intercepted and potentially modified without detection by the client system.
The operational impact of this vulnerability extends beyond simple data interception, as the compromised communication channel exposes highly sensitive information during the DDNS update process. Attackers who successfully execute a man-in-the-middle attack can obtain the user's account email address, which serves as a primary identifier for authentication purposes and can be used for credential stuffing attacks across other services. Additionally, the MD5 hashed password provides attackers with a potential target for password recovery attacks, even though MD5 is considered cryptographically weak and susceptible to rainbow table attacks. The device serial number represents another critical piece of information that can be used for device tracking, inventory management, or potentially for exploiting other device-specific vulnerabilities.
The security implications of this vulnerability align with several ATT&CK framework techniques including T1041, which describes data compression and T1566, which covers credential access through social engineering and network infiltration. The attack vector specifically enables T1190, which involves exploiting vulnerabilities in network protocols, and T1071.004, which covers application layer protocols including HTTPS. Organizations using affected ADM versions face significant risk of unauthorized access to their network infrastructure, as the compromised DDNS update process can provide attackers with persistent access points and additional attack vectors. The vulnerability particularly impacts enterprise environments where ADM is used for network management, as it creates opportunities for attackers to gain deeper insights into network topology and device configurations.
Mitigation strategies should prioritize immediate patching of affected ADM versions to address the certificate validation flaw. Organizations should implement additional network monitoring to detect anomalous DDNS update patterns and establish certificate pinning mechanisms where possible. The recommended approach includes configuring strict hostname validation requirements for all HTTPS connections and implementing network segmentation to limit the scope of potential attacks. Security teams should also conduct comprehensive audits of their DDNS configurations and review access controls to ensure that only authorized entities can perform DDNS updates. Additionally, implementing network intrusion detection systems with signature-based detection for known MitM attack patterns can provide early warning capabilities. The remediation process should include updating all affected devices to patched versions and conducting thorough security assessments to identify any potential compromise that may have occurred during the vulnerability window.