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CRITICAL severity

CVE-2026-40141

CRITICAL

CVE-2026-40141 is a critical-severity (CVSS 9.9) CWE-943 vulnerability in beyondtrust privileged remote access. O3 Security detects and blocks CVE-2026-40141 exploitation at runtime via eBPF exploit-chain detection and L7 egress monitoring, even on unpatched systems.

A high-severity vulnerability exists in a web application component of BeyondTrust Remote Support and Privileged Remote Access related to the processing of certain input parameters. Insufficient…

Published
Jul 6, 2026
Updated
Jul 7, 2026
Affected
2 products
Patched
See advisory
Exploits
None indexed
Exploitation data as of Jul 7, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Description

A high-severity vulnerability exists in a web application component of BeyondTrust Remote Support and Privileged Remote Access related to the processing of certain input parameters. Insufficient validation of user-supplied input may allow an authenticated attacker with limited privileges to access unintended resources or data beyond their authorization scope. Exploitation is restricted to accounts with specific permissions.

Affected Products

2 products · 2 configurations
Application
privileged remote accessbeyondtrust
< 25.3.3
range
Application
remote supportbeyondtrust
< 25.3.3
range

Detection & mitigation playbook

Vendor / appliance
  1. Detect

    Inventory every beyondtrust privileged remote access deployment and check each version against the affected-products list above. Because the exploit targets the running system rather than your application code, also watch for exploitation at the network and runtime layer — O3 flags the exploit behaviour from runtime telemetry and egress traffic even before a vulnerable build is confirmed.

  2. Fix

    Apply the beyondtrust privileged remote access security patch or hotfix for CVE-2026-40141 on the affected version, following the vendor advisory for your exact build.

  3. Workarounds

    Cut exposure now: restrict the management/admin interface to trusted networks, segment the device, and apply the vendor's recommended configuration mitigations and any WAF/IPS signature. O3's runtime protection blocks the exploit chain at execution, holding the line on unpatched or end-of-life systems until you can patch.

  4. How O3 protects you

    O3 detects and blocks CVE-2026-40141 exploitation at runtime: eBPF exploit-chain detection, plus L7 egress monitoring that catches the post-exploitation callback and severs the attacker's outbound channel.

Tailored to CVE-2026-40141. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.

Frequently Asked Questions

A high-severity vulnerability exists in a web application component of BeyondTrust Remote Support and Privileged Remote Access related to the processing of certain input parameters. Insufficient validation of user-supplied input may allow an authenticated attacker with limited privileges to access unintended resources or data beyond their authorization scope. Exploitation is restricted to accounts with specific permissions.
O3 Security · Runtime Protection

Is CVE-2026-40141 being exploited in your environment?

O3's eBPF runtime sensors and L7 egress monitoring detect and block the CVE-2026-40141 exploit chain at execution — protecting unpatched and end-of-life systems until the vendor patch is applied.

CVE-2026-40141: Privileged Remote Access… | O3 Security