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Vulnerability record · CVE-2026-40138 · published 6 July 2026

CVE-2026-40138: 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 and Privileged Remote Access. Improper validation of authentication data may allow a network-positioned 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 0.46% · top 62.7% CWE-287 · Improper authentication
9.2CVSS 4.0 base score
0.46%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 and Privileged Remote Access. Improper validation of authentication data may allow a network-positioned 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:H/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-2026-40139Beyondtrust privileged remote access improper authentication vulnerabilityA critical pre-authentication vulnerability exists in the authentication subsystem of BeyondTrust Remote Support. Improper processing of authenticati…EPSS 0.75%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-2026-40138), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.