CVE-2026-40139

critical · 9.2

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.

9.2

CVSS

0.8%

EPSS (exploit prob.)

54th

EPSS percentile

2026-07-06

Published

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

Weaknesses

CWE-287

Affected products

Vendor	Product	Affected versions
beyondtrust	privileged_remote_access	< 25.3.3
beyondtrust	remote_support	< 25.3.3

Check a specific version with /api/v1/cve/match.

References

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

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2026-40139