CVE-2026-24935 in ADM
Summary
by MITRE • 02/03/2026
A third-party NAT traversal module fails to validate SSL/TLS certificates when connecting to the signaling server. While subsequent access to device services requires additional authentication, a Man-in-the-Middle (MitM) attacker can intercept or redirect the NAT tunnel establishment. This could allow an attacker to disrupt service availability or facilitate further targeted attacks by acting as a proxy between the user and the device services. Affected products and versions include: from ADM 4.1.0 through ADM 4.3.3.ROF1 as well as from ADM 5.0.0 through ADM 5.1.1.RCI1.
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Analysis
by VulDB Data Team • 02/19/2026
The vulnerability described in CVE-2026-24935 represents a critical security flaw in the NAT traversal module of certain ADM (Advanced Device Management) software versions. This issue stems from inadequate SSL/TLS certificate validation during the signaling server connection process, creating a significant attack vector that undermines the integrity of the device management infrastructure. The flaw exists within the communication protocol stack where the system fails to properly authenticate the identity of the signaling server, leaving the door open for malicious actors to exploit this weakness in the network architecture.
The technical implementation of this vulnerability manifests as a failure in the certificate validation mechanism that should normally ensure secure communication channels between client devices and the signaling server. When SSL/TLS connections are established without proper certificate verification, the system becomes susceptible to man-in-the-middle attacks where an attacker can position themselves between the legitimate client and server. This specific weakness falls under CWE-295 which addresses improper certificate validation, and aligns with ATT&CK technique T1573.002 for "Encrypted Channel" where adversaries establish secure communication channels to maintain access. The vulnerability's impact is amplified by the fact that while subsequent device service access requires additional authentication, the initial NAT tunnel establishment remains unprotected, allowing attackers to intercept or redirect tunnel creation requests.
The operational consequences of this vulnerability extend beyond simple service disruption to enable more sophisticated attack scenarios that can compromise device management systems. An attacker exploiting this vulnerability can effectively act as a proxy, intercepting all communication between users and device services while maintaining the appearance of legitimate network traffic. This capability allows for service availability disruption through tunnel redirection, potentially causing legitimate users to lose access to their managed devices. The attack surface is particularly concerning given that the affected versions span multiple release lines from ADM 4.1.0 through 4.3.3.ROF1 and from ADM 5.0.0 through 5.1.1.RCI1, indicating a widespread deployment issue that affects numerous installations across different product generations. This vulnerability creates opportunities for further targeted attacks as the attacker can manipulate the signaling process to redirect traffic or inject malicious commands, potentially leading to complete system compromise.
Mitigation strategies for this vulnerability must address both immediate protection and long-term architectural improvements to prevent similar issues in future deployments. Organizations should implement certificate pinning mechanisms to ensure that only trusted certificates are accepted during the signaling process, thereby preventing attackers from substituting valid certificates with malicious ones. Network administrators should also consider deploying additional monitoring solutions that can detect unusual tunnel establishment patterns or unexpected connection behaviors that might indicate an active MitM attack. The implementation of certificate validation controls should follow industry standards such as those outlined in NIST SP 800-57 for cryptographic key management and TLS protocol implementation. Additionally, the affected systems should be upgraded to versions that include proper certificate validation mechanisms, and organizations should conduct thorough network audits to identify any potential exploitation attempts that may have occurred during the vulnerability's active period. The remediation approach should also include regular security assessments of third-party modules to ensure that all components maintain proper security hygiene and validation practices.