Critical Pre-Authentication Vulnerability in BeyondTrust Remote Support and Privileged Remote Access

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Summary

CVECVE-2026-40139
StatePUBLISHED
AssignerBT
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-06 17:16:30 UTC
Updated2026-07-07 16:16:38 UTC
DescriptionA 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.

Risk And Classification

Primary CVSS: v4.0 9.2 CRITICAL from 13061848-ea10-403d-bd75-c83a022c2891

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:X/V:X/RE:X/U:X

Problem Types: CWE-287 | CWE-287 CWE-287 Improper Authentication

VersionSourceTypeScoreSeverityVector
4.013061848-ea10-403d-bd75-c83a022c2891Secondary9.2CRITICALCVSS: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/C...
4.0CNACVSS9.2CRITICALCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS v4.0 Breakdown

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
Present
Privileges Required
None
User Interaction
None
Confidentiality
High
Integrity
High
Availability
High
Sub Conf.
None
Sub Integrity
None
Sub Availability
None

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:X/V:X/RE:X/U:X

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA BeyondTrust Remote Support affected 25.3.2 custom Not specified
CNA BeyondTrust Privileged Remote Access affected 25.3.2 custom Not specified

References

ReferenceSourceLinkTags
www.beyondtrust.com/trust-center/security-advisories/bt26-03 13061848-ea10-403d-bd75-c83a022c2891 www.beyondtrust.com
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NVD vulnerability detail NVD nvd.nist.gov canonical, analysis
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