CVE-2026-40138 — HIGH (8.1)

Q: How severe is CVE-2026-40138?

CVE-2026-40138 has been rated HIGH with a CVSS base score of 8.1/10. Review the CVSS metrics above for detailed severity breakdown.

Q: Is there a patch for CVE-2026-40138?

Check the references section above for vendor advisories and patch information. Affected products include: Beyondtrust Privileged Remote Access, Beyondtrust Remote Support.

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

CVSS Score

8.1

HIGH

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Affected Products

Vendor	Product	Versions
Beyondtrust	Privileged Remote Access	< 25.3.3
Beyondtrust	Remote Support	< 25.3.3

Related Weaknesses (CWE)

CWE-287

References

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

FAQ

What is CVE-2026-40138?

CVE-2026-40138 is a vulnerability with a CVSS score of 8.1 (HIGH). 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 ne...

How severe is CVE-2026-40138?

CVE-2026-40138 has been rated HIGH with a CVSS base score of 8.1/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-40138?

Check the references section above for vendor advisories and patch information. Affected products include: Beyondtrust Privileged Remote Access, Beyondtrust Remote Support.