CVE-2026-40138
HighCVSS 8.1Exploitation Probability (EPSS)
Low risk34th percentile - higher than 34% of all known CVEs
Summary
A critical pre-authentication vulnerability 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 Assessment
The organization is at risk of complete compromise of the BeyondTrust appliance by an unauthenticated network attacker, potentially leading to data theft, privilege escalation, and further attacks on IT infrastructure.
Recommendation
Immediately apply the security update provided by BeyondTrust and verify that the authentication configuration is not set in a way that allows exploitation of the vulnerability.
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Original NVD description (English source)
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
Vulnerability data from NVD (NIST) · CISA KEV · EPSS