CVE-2026-40138
CWE-287Published: July 6, 2026· Updated: Jul 7, 2026
Official 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
Risk Analysis
This critical pre-authentication vulnerability in BeyondTrust Remote Support and Privileged Remote Access allows network-positioned attackers to bypass access controls. Improper validation of authentication data can lead to unauthorized access, including to accounts with elevated privileges. The CVSS score of 9.2 indicates a severe risk of system compromise.
No public exploit is currently known for this vulnerability. The flaw is remotely exploitable without authentication, but requires a specific authentication configuration to be enabled.
Apply the latest security updates for BeyondTrust Remote Support and Privileged Remote Access. Review and adjust authentication configurations to minimize exposure to this vulnerability.
Technical Analysis
CVE-2026-40138 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.
A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 8.1.
From a weakness classification perspective (CWE-287): Authentication bypass vulnerabilities allow attackers to access protected resources without valid credentials.
CVSS v3.1 Vector Breakdown
Affected Vendors & Products
Exploit & PoC Resources
Official Patches & Advisories
News & Research Mentioning CVE-2026-40138
BeyondTrust has released updates to address two critical security flaws affecting Remote Support (RS) and Privileged Remote Access (PRA) products that, if successfully exploited, could allow unauthenticated attackers to take control of susceptible devices. The vulnerabilities are listed below - CVE-2026-40138 (CVSS score: 9.2) - A pre-authentication vulnerability exists in the [xlite_meta score:50 src:The Hacker News xlite_fp:71fb3a1e8a3be18bed8e073f5117dfdbb961b2332ee2e4fd64cd9e2c346f101d]
All References (1)
Quick Facts
Related CVEs (CWE-287)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2026-40138 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts