BeyondTrust Remote Support Pre-Authentication DoS Vulnerability

Publication date: 2026-07-06

Last updated on: 2026-07-07

Assigner: BeyondTrust

Description

BeyondTrust Remote Support and Privileged Remote Access contain a high-severity pre-authentication vulnerability in the network communication subsystem. Insufficient validation of client-supplied input may allow an unauthenticated remote attacker to trigger a denial-of-service condition affecting appliance availability.

CVSS Scores

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Meta Information

Published

2026-07-06

Last Modified

2026-07-07

Generated

2026-07-27

AI Q&A

2026-07-06

EPSS Evaluated

2026-07-25

NVD

CVE-2026-40140

EUVD

EUVD-2026-41888

Affected Vendors & Products

Vendor	Product	Version / Range
beyondtrust	privileged_remote_access	to 25.3.3 (exc)
beyondtrust	remote_support	to 25.3.3 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-400	The product does not properly control the allocation and maintenance of a limited resource.

Attack-Flow Graph

Executive Summary

This vulnerability exists in BeyondTrust Remote Support and Privileged Remote Access products. It is a high-severity pre-authentication flaw in the network communication subsystem. The issue arises because the system does not sufficiently validate input provided by clients, which means an unauthenticated remote attacker can exploit this to cause a denial-of-service (DoS) condition, making the appliance unavailable.

Impact Analysis

The primary impact of this vulnerability is that an unauthenticated remote attacker can trigger a denial-of-service condition. This means the affected appliance could become unavailable, potentially disrupting remote support and privileged remote access services that rely on these BeyondTrust products.

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