Vulnerability Report

CVE-2026-40140

Title: Pre-authentication DoS in BeyondTrust network subsystem

DoS

Proof Of Concept

No public PoC currently indexed for CVE-2026-40140.

CWE Category CWE-400

Published Date Jul 06, 2026

Modified Date Jul 07, 2026

Exploit Status Not Found

Score 8.7 CVSS v4.0

Exploit Probability (EPSS)

0.65%

Vulnerability Summary

CVE-2026-40140: 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.

Impacted Vendors

beyondtrust 2

Reference Links

https://www.beyondtrust.com/trust-center/security-advisories/bt26-03

CVSS v4.0

Source Entity 13061848-ea10-403d-bd75-c83a022c2891

Severity HIGH

8.7

Attack Vector

NETWORK

Complexity

LOW

Privileges

N/A

Interaction

NONE

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

N/A

RAW VECTOR

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v3.1

Source Entity [email protected]