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CVE-2026-40139— 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 Privilege Remote Access存在授权问题漏洞，该漏洞源于认证请求处理不当，可能导致未经身份验证的远程攻击者绕过访问控制并获得设备未授权访问，包括具有提升权限的账户。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 9.1 Difficulty: Easy EPSS 0.75% · P53

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-2026-40139

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. 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.
Source: CVE Program / CVE List V5
CVSS Information
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
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 Privilege Remote Access存在授权问题漏洞，该漏洞源于认证请求处理不当，可能导致未经身份验证的远程攻击者绕过访问控制并获得设备未授权访问，包括具有提升权限的账户。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-2026-40139

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III. Intelligence Information for CVE-2026-40139

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Vendor Advisories for CVE-2026-40139 (1)

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

CVE-2026-40138 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-2026-40139

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