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CVE-2026-40138— Critical Pre-Authentication Vulnerability in BeyondTrust Remote Support and Privileged Remote Access

Quick assessment

Affected
BeyondTrust Remote Support
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

BeyondTrust remote support是美国BeyondTrust公司的一款远程支持工具。 BeyondTrust Remote Support和BeyondTrust Privileged Remote Access存在授权问题漏洞，该漏洞源于身份验证数据验证不当，可能导致网络攻击者绕过访问控制并获取未授权访问，包括拥有提升权限的账户。利用此漏洞需要启用特定的身份验证配置。以下版本受到影响：26.2.1之前版本和25.3.3之前版本。

AI Predicted 9.8 Difficulty: Easy EPSS 0.46% · P38

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 2

VendorProduct Version RangeStatus
BeyondTrust Privileged Remote Access ≤ 25.3.2 affected
BeyondTrust Remote Support ≤ 25.3.2 affected
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I. Basic Information for CVE-2026-40138

Vulnerability Information
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Vulnerability Title
Critical Pre-Authentication Vulnerability in BeyondTrust Remote Support and Privileged Remote Access
Source: CVE Program / CVE List V5
Vulnerability 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
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
认证机制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
BeyondTrust Remote Support 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
BeyondTrust remote support是美国BeyondTrust公司的一款远程支持工具。 BeyondTrust Remote Support和BeyondTrust Privileged Remote Access存在授权问题漏洞，该漏洞源于身份验证数据验证不当，可能导致网络攻击者绕过访问控制并获取未授权访问，包括拥有提升权限的账户。利用此漏洞需要启用特定的身份验证配置。以下版本受到影响：26.2.1之前版本和25.3.3之前版本。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
BeyondTrust Remote Support 0 ~ 25.3.2 -
BeyondTrust Privileged Remote Access 0 ~ 25.3.2 -

II. Public POCs for CVE-2026-40138

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III. Intelligence Information for CVE-2026-40138

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Vendor Advisories for CVE-2026-40138 (1)

Same Patch Batch · BeyondTrust · 2026-07-06 · 4 CVEs total

CVE-2026-40139 Critical Pre-Authentication Vulnerability in BeyondTrust Remote Support and Privileged Rem
CVE-2026-40140 High-Severity Pre-Authentication Vulnerability in BeyondTrust Remote Support and Privilege
CVE-2026-40141 High-Severity Vulnerability In Web Application Component of BeyondTrust Remote Support and

IV. Related Vulnerabilities

Same product: Remote Support
Same vendor: BeyondTrust
Same weakness: CWE-287

V. Comments for CVE-2026-40138

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