CVE-2026-40139 Critical Pre-Authentication Vulnerability in BeyondTrust Remote Support and Privileged Remote Access

Critical 9.2 Published 6 Jul 2026 Updated 7 Jul 2026

Unauthenticated attackers can bypass access controls to gain unauthorized access to the appliance, including elevated privileges, if specific authentication settings are enabled.

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-2026-40139?

CVE-2026-40139 is a critical authentication bypass 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

A critical pre-authentication vulnerability exists 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.

Weakness: CWE-287

Which versions are affected by CVE-2026-40139?

It affects 2 products.

Products include Beyondtrust Privileged Remote Access, Beyondtrust Remote Support.

How do I fix CVE-2026-40139?

No fix has been published for CVE-2026-40139 yet. Limit exposure of the affected software until one is available.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2026-40139 being exploited?

There is no known exploitation of CVE-2026-40139 in the wild and no public exploit code.

Sources

Also known as GHSA-5wv8-v74x-qrjc.