External risk intelligence

BeyondTrust Remote Support Unauthenticated File Operations Vulnerability

CVE advisorySeverity: CRITICAL (CVSS 9.3)

CVE-2026-102764

BeyondTrust Remote Support is an appliance designed specifically for external access, remote support, and gateway functionality. Such products are typically deployed at the network edge to facilitate connectivity across network boundaries, making their management interfaces and services public-facing by design in standard deployments.

Halo Surface Signal: 5 out of 5 — more likely to be public-facing.

External exposure likelihood

Horizon Alert

Summary of the vulnerability and why it matters

This critical vulnerability in BeyondTrust's Remote Support product could allow an attacker to perform unauthorized file operations on the appliance due to insufficient validation of incoming messages.

  • Issue: Unvalidated messages permit file operations.
  • Why remember: Potential for unauthorized file access.
  • Executive takeaway: Confirm relevance and exposure.

Attack Path

How an attacker could exploit the issue

An attacker could begin by reaching an internal component of BeyondTrust Remote Support. If this component does not properly check where its messages originate, an attacker could potentially manipulate it to perform unauthorized file operations on the appliance.

  • Accessible over the network.
  • Unvalidated message origins.
  • Unauthorized file operations on appliance.

Live Threat

Current exploitation, exposure, and threat context

This vulnerability could allow an attacker to perform unauthorized file operations on the appliance, potentially impacting system integrity and data on the device. This is possible when the product's internal components do not properly validate incoming messages.

  • Appliance files could be affected.
  • Unvalidated messages could be exploited.
  • System compromise may occur.

Operational Fix

Recommended remediation, mitigation, and detection steps

This vulnerability resides within BeyondTrust's Remote Support product's internal components, specifically in how they validate incoming messages. This could allow an attacker to conduct unauthorized file operations on the appliance. Action owners should first identify all instances of the affected product, assess their exposure and business criticality, then locate the accountable system owner to plan remediation.

  • Identify affected BeyondTrust Remote Support instances.
  • Verify product accessibility and business criticality.
  • Plan risk-based remediation with accountable owners.

Supplementary metadata

Validate whether this threat affects your internet-facing exposure.

Halo Threat Intelligence helps prioritize remediation with Halo Surface Signal and H/A/L/O context. Start exposure validation with a free external attack surface trial.

Frequently asked questions

What is BeyondTrust Remote Support?

BeyondTrust Remote Support is a specialized appliance used by organizations to facilitate secure remote access and support across network boundaries. It serves as a gateway, often positioned to bridge connectivity between internal networks and external users or devices, making it a central hub for managing remote technical assistance sessions.

What does CWE-290 mean for CVE-2026-102764?

CVE-2026-102764 involves a weakness classified as CWE-290, which refers to Authentication Bypass by Spoofing. In this context, it means the software fails to properly verify the source or legitimacy of incoming messages. Because it lacks this validation, the system incorrectly trusts unauthorized requests as if they were legitimate, allowing an attacker to manipulate file operations on the appliance.

How does an attacker trigger this vulnerability?

An attacker triggers this vulnerability by sending specially crafted messages to specific internal components of the appliance that do not check the origin of those messages. If a message successfully reaches these components, the system may perform unauthorized file operations. Simply interacting with the public web portal of the software does not inherently guarantee this specific path is triggered.

Is my BeyondTrust Remote Support instance at risk?

According to Halo Surface Signal, this product is designed for external access and is frequently deployed at the network edge to function as a gateway. Because these appliances are public-facing by design to facilitate remote connectivity, they are often accessible over the network. If your instance is reachable from the internet, it is relevant to your risk profile.

What should I do if I use this software?

Start by performing an inventory to locate all instances of BeyondTrust Remote Support within your environment. Once identified, evaluate the business criticality of each device and coordinate with the accountable system owners to prioritize and plan your remediation strategy based on the specific exposure of your deployments.

References