CVE-2026-40140

High-Severity Pre-Authentication Vulnerability in BeyondTrust Remote Support and Privileged Remote Access

At a glance

Severity: HIGH 8.7
EPSS: EPSS 0.65 % · percentile 51 (2026-10-27)
State: PUBLISHED
Published: 2026-07-06
Updated: 2026-07-07
Assigner: BT
NVD status: Analyzed

Description

BeyondTrust Remote Support and Privileged Remote Access contain a high-severity pre-authentication vulnerability in the network communication subsystem. Insufficient validation of client-supplied input may allow an unauthenticated remote attacker to trigger a denial-of-service condition affecting appliance availability.

Scores

Version	Score	Vector	Scored by
CVSS 4.0	HIGH 8.7	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N	BT
CVSS 4.0	HIGH 8.7	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/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	HIGH 7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	NVD · nvd@nist.gov (Primary)

Weaknesses (CWE)

CWE-400

European references

ENISA EUVD · EUVD-2026-41888
GCVE · GCVE-0-2026-40140

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