CVE-2026-102764 in Remote Support
Summary
by MITRE • 10/16/2026
The vulnerability exists within internal components of BeyondTrust’s Remote Support product. The components did not adequately validate the origin of the messages it received. Under the right conditions, this could allow an attacker to perform file operations on the appliance.
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Analysis
by VulDB Data Team • 10/16/2026
BeyondTrust Remote Support is a widely deployed privileged access management and remote support solution used by organizations to facilitate secure administrative tasks and technical assistance. The vulnerability identified in this context resides within internal components of the application that handle message processing between various subsystems or services running on the same appliance. These internal communication channels are often assumed to be trusted because they operate locally, but security best practices dictate that no input should ever be implicitly trusted without verification. In this specific instance, the affected components failed to adequately validate the origin of incoming messages. This lack of source validation means that any entity capable of injecting or spoofing network traffic directed at these internal endpoints can masquerade as a legitimate system component.
The technical flaw centers on an insufficient authentication and integrity check mechanism for inter-process communication. When the application receives data packets intended for its internal services, it proceeds to process them without confirming whether they originated from authorized local processes with valid credentials or digital signatures. This architectural oversight creates a pathway for message injection attacks. An attacker who has achieved initial access to the system, perhaps through a separate vulnerability such as an unauthenticated web interface entry point or by exploiting weak service account permissions, can craft malicious payloads that mimic legitimate internal messages. By spoofing the source identity of these messages, the attacker bypasses logical security controls designed to restrict actions based on user role or process origin.
The operational impact of this weakness is significant because it allows for unauthorized file operations on the appliance hosting the Remote Support service. File system access in such environments often grants control over configuration files, logs, scripts, and potentially executable binaries. If an attacker can write arbitrary data to specific directories, they may overwrite critical configuration settings to disable logging or security features, plant malicious scripts for persistence, or replace legitimate executables with trojanized versions. This capability effectively elevates the attacker's privileges from a low-level user context to one where they exert substantial control over the application’s behavior and underlying operating system state. The ability to manipulate files can lead to complete compromise of the remote support infrastructure, enabling further lateral movement into connected networks or exfiltration of sensitive data stored within the appliance environment.
From an industry standard perspective, this vulnerability aligns with CWE-287: Improper Authentication, specifically regarding the failure to verify the identity of a principal in inter-process communication contexts. It also relates closely to CWE-913: Control of Resource From Untrusted Control Sphere, as the attacker leverages unvalidated input to influence system resources outside their intended scope. In terms of MITRE ATT&CK mapping, this behavior is consistent with techniques involving Command and Scripting Interpreter abuse or File Manipulation for persistence and impact. The attack vector typically requires local access or network proximity if internal services are exposed on accessible interfaces, highlighting the risk of over-permissive service configurations in enterprise environments.
Mitigation strategies should focus on implementing strict identity verification for all inter-component communications. Developers must enforce mutual authentication protocols such as TLS with client certificates or use secure IPC mechanisms that include cryptographic signing and validation of message origins. Access control lists should be tightened to ensure that only authorized system accounts can communicate with these internal endpoints, utilizing principle of least privilege to limit the blast radius if a component is compromised. Additionally, network segmentation within the host environment using firewall rules can restrict which processes are allowed to send traffic to specific ports associated with vulnerable services. Organizations currently running affected versions should apply vendor-provided patches immediately and audit their deployment configurations for any exposed internal interfaces that could be leveraged by local attackers. Regular security assessments focusing on inter-process communication integrity will help identify similar architectural weaknesses before they can be exploited in production environments.