Unauthenticated attackers can crash BeyondTrust Remote Support appliances via a network-communication flaw
Status: UPDATED
| Advisory ID: CVE-2026-40140
Key Details
| CVE | CVE-2026-40140 |
| CVSS Score / Version | 7.5 (High) / CVSS v3.1 |
| CVSS Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| CVSS Prose | attack vector is network; attack complexity is low; privileges required is none; user interaction is none; scope is unchanged; confidentiality impact is none; integrity impact is none; availability impact is high. |
| Affected products | BeyondTrust remote_support |
| Classified as | CWE-400 (Uncontrolled Resource Consumption) |
| Exploitation prediction (EPSS) | 0.65% probability of exploitation in the next 30 days (50% percentile) -- FIRST.org's EPSS model. |
Affected Products, Subsystems & Sectors
| Subsystems | General OT |
| Sectors | Multiple |
What to Know
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.
What to Do
Monitor BeyondTrust's web page for any future patch releases. See vendor advisory link below.
References