CVE-2026-40140 High-Severity Pre-Authentication Vulnerability in BeyondTrust Remote Support and Privileged Remote Access

High 8.7 Published 6 Jul 2026 Updated 7 Jul 2026

Unauthenticated remote attackers can cause denial of service in BeyondTrust Remote Support and Privileged Remote Access via insufficient input validation.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-40140?

CVE-2026-40140 is a high-severity denial of service vulnerability in BeyondTrust Privileged Remote Access, published on 6 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official 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.

Weakness: CWE-400

Which versions are affected by CVE-2026-40140?

It affects 2 products.

Products include Beyondtrust Privileged Remote Access, Beyondtrust Remote Support.

How do I fix CVE-2026-40140?

No fix has been published for CVE-2026-40140 yet. Limit exposure of the affected software until one is available.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2026-40140 being exploited?

There is no known exploitation of CVE-2026-40140 in the wild and no public exploit code.

Sources

Also known as GHSA-8v46-5p7g-p46j.