Is CVE-2026-40139 actively exploited?

No active exploitation of CVE-2026-40139 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-40139 be exploited remotely?

Yes. CVE-2026-40139 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-40139?

CVE-2026-40139 has a CVSS score of 9.8 (CRITICAL).

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CRITICAL

CVE-2026-40139

CWE-287Published: July 6, 2026· Updated: Jul 7, 2026

9.8

CVSS v3.1

EPSS:0.65%probability of exploitation in 30 daysPercentile:46.8th

Official Description

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.

NVD Source

Risk Analysis

A critical pre-authentication vulnerability in BeyondTrust Remote Support's authentication subsystem allows unauthenticated remote attackers to bypass access controls. This 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.

Recommended Action

Apply the latest security updates for BeyondTrust Remote Support. Review and adjust authentication configurations to minimize exposure to this vulnerability.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2026-40139 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 9.8.

From a weakness classification perspective (CWE-287): Authentication bypass vulnerabilities allow attackers to access protected resources without valid credentials.