---
cve: "CVE-2026-40138"
severity: "CRITICAL"
cvss: 9.2
epss: "44%"
vendor: "BeyondTrust"
kev: false
exploited: false
published: "2026-07-06 17:16:30"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-09-10T07:48:26+02:00"
---

# CVE-2026-40138

> 9.2 CRITICAL

## Beschreibung

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-Vektor

```
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
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Hoch | good |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |

## Referenzen

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

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-40138) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_