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Vulnerability record · CVE-2026-40139 · published 6 July 2026

CVE-2026-40139: Beyondtrust privileged remote access improper authentication vulnerability

Beyondtrust · Privileged Remote Access

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.

9.2 CVSS 4.0 Critical EPSS 0.75% · top 46.8% CWE-287 · Improper authentication
9.2CVSS 4.0 base score
0.75%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
1References
7 Jul 2026Last modified by NVD

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.

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/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:

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

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

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.9CVE-2026-1731BeyondTrust Remote Support and PRA pre-auth OS command injectionBeyondTrust Remote Support and certain older Privileged Remote Access versions contain an OS command injection flaw (CWE-78) reachable before authent…KEVEPSS 91%analysed9.8CVE-2024-12356BeyondTrust PRA and RS unauthenticated command injectionBeyondTrust Privileged Remote Access (PRA) and Remote Support (RS) contain a command injection flaw (CWE-77) that lets an unauthenticated attacker in…KEVEPSS 87%analysed7.2CVE-2024-12686BeyondTrust PRA and RS OS command injection by adminBeyondTrust Privileged Remote Access (PRA) and Remote Support (RS) contain an OS command injection flaw (CWE-78). An attacker who already holds admin…KEVEPSS 14%analysed9.8CVE-2023-4310Beyondtrust privileged remote access command injection vulnerabilityBeyondTrust Privileged Remote Access (PRA) and Remote Support (RS) versions 23.2.1 and 23.2.2 contain a command injection vulnerability which can be …EPSS 1.8%9.2CVE-2026-40138Beyondtrust privileged remote access improper authentication vulnerabilityA critical pre-authentication vulnerability exists in the authentication subsystem of BeyondTrust Remote Support and Privileged Remote Access. Improp…EPSS 0.46%8.7CVE-2026-40140Beyondtrust privileged remote access uncontrolled resource consumption vulnerabilityBeyondTrust Remote Support and Privileged Remote Access contain a high-severity pre-authentication vulnerability in the network communication subsyst…EPSS 0.65%8.6CVE-2025-5309Beyondtrust privileged remote access code injection vulnerabilityThe chat feature within Remote Support (RS) and Privileged Remote Access (PRA) is vulnerable to a Server-Side Template Injection vulnerability which …EPSS 0.95%8.5CVE-2026-40141Beyondtrust privileged remote access vulnerabilityA high-severity vulnerability exists in a web application component of BeyondTrust Remote Support and Privileged Remote Access related to the process…EPSS 0.53%

Source: NIST National Vulnerability Database (record CVE-2026-40139), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.