CVE-2026-40138

Published Jul 6, 2026

Last updated 2 months ago

Beyondtrust

Overview

AI description

Automated description summarized from trusted sources.

CVE-2026-40138 is a pre-authentication vulnerability found in the authentication subsystem of BeyondTrust Remote Support and Privileged Remote Access products. This flaw, categorized as an improper authentication issue (CWE-287), arises from inadequate validation of authentication data. A network-positioned attacker could exploit this vulnerability to bypass existing access controls and gain unauthorized access to the appliance, potentially with elevated privileges. Successful exploitation is contingent upon a specific authentication configuration being enabled within the affected systems.

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
Source: 13061848-ea10-403d-bd75-c83a022c2891
NVD status: Analyzed
Products: privileged_remote_access, remote_support

Risk scores

CVSS 4.0

Type: Secondary
Base score: 9.2
Impact score: -
Exploitability score: -
Vector string: CVSS:4.0/AV:N/AC:H/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
Severity: CRITICAL

CVSS 3.1

Type: Primary
Base score: 8.1
Impact score: 5.9
Exploitability score: 2.2
Vector string: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Severity: HIGH

Weaknesses

13061848-ea10-403d-bd75-c83a022c2891: CWE-287

Hype score: Not currently trending

Configurations

[
  {
    "nodes": [
      {
        "cpeMatch": [
          {
            "criteria": "cpe:2.3:a:beyondtrust:privileged_remote_access:*:*:*:*:*:*:*:*",
            "matchCriteriaId": "79807D69-2935-4EC4-B34F-3BBFCE1D6EC1",
            "versionEndExcluding": "25.3.3",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:a:beyondtrust:remote_support:*:*:*:*:*:*:*:*",
            "matchCriteriaId": "91823A93-2793-4FA6-AB9B-60E62102AE0E",
            "versionEndExcluding": "25.3.3",
            "vulnerable": true
          }
        ],
        "negate": false,
        "operator": "OR"
      }
    ]
  }
]

References

Sources include official advisories and independent security research.