CVE-2026-40139

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

At a glance

Severity: CRITICAL 9.2
EPSS: EPSS 0.75 % · percentile 55 (2026-10-28)
State: PUBLISHED
Published: 2026-07-06
Updated: 2026-07-07
Assigner: BT
NVD status: Analyzed

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.

Scores

Version	Score	Vector	Scored by
CVSS 4.0	CRITICAL 9.2	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	BT
CVSS 4.0	CRITICAL 9.2	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	NVD · 13061848-ea10-403d-bd75-c83a022c2891 (Secondary)
CVSS 3.1	CRITICAL 9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	NVD · nvd@nist.gov (Primary)

Weaknesses (CWE)

CWE-287

European references

ENISA EUVD · EUVD-2026-41887
GCVE · GCVE-0-2026-40139

Affected configurations (NVD CPE)

cpe:2.3:a:beyondtrust:privileged_remote_access:*:*:*:*:*:*:*:* < 25.3.3
cpe:2.3:a:beyondtrust:remote_support:*:*:*:*:*:*:*:* < 25.3.3

Affected products

Product	Versions
BeyondTrust · Remote Support	affected 0 ≤ 25.3.2
BeyondTrust · Privileged Remote Access	affected 0 ≤ 25.3.2

References

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

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD