Actively exploited in the wild
BeyondTrust Remote Support Authentication Bypass by Spoofing Vulnerability
BeyondTrust - Remote Support · Listed in the CISA KEV since 2026-10-16. This indicates confirmed attacks in production environments.
Required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
CVE-2026-102764
CriticalCVSS 9.8KEVExploitation Probability (EPSS)
Low risk48th percentile - higher than 48% of all known CVEs
Summary
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.
Risk Assessment
An attacker could perform unauthorized file operations on the BeyondTrust Remote Support appliance, potentially compromising system integrity.
Recommendation
Apply the security updates provided by BeyondTrust for Remote Support and restrict network access to the appliance.
Other vulnerabilities in BeyondTrust Remote Support
See all- CVE-2026-40141Critical
A high-severity vulnerability was found in the web application component of BeyondTrust Remote Support and Privileged Remote Access related to input parameter processing. Insufficient input validation may allow an authenticated attacker with limited privileges to access unauthorized resources or data beyond their scope.
- CVE-2026-40139Critical
A critical pre-authentication vulnerability in the authentication subsystem of BeyondTrust Remote Support. Improper processing of authentication requests may allow an unauthenticated remote attacker to bypass access controls and gain unauthorized access to the appliance, including accounts with elevated privileges. Exploitation requires a specific authentication configuration to be enabled.
- CVE-2026-40140High
A vulnerability in BeyondTrust Remote Support and Privileged Remote Access allows an unauthenticated remote attacker to trigger a denial-of-service (DoS) condition due to insufficient validation of client-supplied input in the network communication subsystem.
Original NVD description (English source)
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS