CVE-2026-40139
CriticalCVSS 9.8Exploitation Probability (EPSS)
Low risk47th percentile - higher than 47% of all known CVEs
Summary
A critical pre-authentication vulnerability in the authentication subsystem of BeyondTrust Remote Support. Improper processing of authentication requests may allow an unauthenticated remote 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 Remote Support appliance by an unauthenticated attacker, potentially leading to data theft, privilege escalation, and further attacks on the IT infrastructure.
Recommendation
Immediately update BeyondTrust Remote Support to the latest patched version and review/disable any unnecessary authentication configurations that may be required for exploitation.
Original NVD description (English source)
A critical pre-authentication vulnerability exists in the authentication subsystem of BeyondTrust Remote Support. Improper processing of authentication requests may allow an unauthenticated remote 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.