Status: UPDATED | Advisory ID: CVE-2026-40139
| CVE | CVE-2026-40139 |
| CVSS Score / Version | 9.8 (Critical) / CVSS v3.1 |
| Updated | 2026-09-24 |
| CVSS Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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 high; integrity impact is high; availability impact is high. |
| Affected products | BeyondTrust Remote Support |
| Classified as | CWE-287 (Improper Authentication) |
| Exploitation prediction (EPSS) | 0.75% probability of exploitation in the next 30 days (53% percentile) -- FIRST.org's EPSS model. |
| Vendor | Product | Affected Versions | Patch Status |
|---|---|---|---|
| BeyondTrust | Remote Support |
| Subsystems | OT Secure Remote Access/PAM |
| Sectors | Multiple |
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.
Monitor BeyondTrust's web page for any future patch releases. See vendor advisory link below.