Quick answers
- Is CVE-2026-40140 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-40140 being exploited in the wild.
- How severe is CVE-2026-40140?
- Informational severity, with a CVSS score of 8.7, published 6 July 2026.
- Which products and versions are affected?
- BeyondTrust Privileged Remote Access < 25.3.3, < 26.2.1; BeyondTrust Remote Support < 25.3.3, < 26.2.1.
- Is there a fix for CVE-2026-40140?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-40140 attacked?
- It is attacked over the network, in a network appliance.
- Am I affected by CVE-2026-40140?
- Check whether you run BeyondTrust Privileged Remote Access or BeyondTrust Remote Support at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
A denial-of-service (DoS) vulnerability exists in the network communication subsystem of BeyondTrust Remote Support and Privileged Remote Access. The flaw is categorized as CWE-400 (Uncontrolled Resource Consumption) and stems from insufficient validation of client-supplied input. An unauthenticated remote attacker can exploit this by sending specially crafted network traffic to the appliance, leading to resource exhaustion or service failure. This vulnerability is pre-authentication, meaning no valid credentials are required to trigger the crash. Patches are available in versions 25.3.3 and 26.2.1.
Affected products
- BeyondTrust Remote Support < 25.3.3, < 26.2.1
- BeyondTrust Privileged Remote Access < 25.3.3, < 26.2.1
Timeline
- 2026-07-06: disclosed
- 2026-07-06: advisory