CVE-2026-40140
High-Severity Pre-Authentication Vulnerability in BeyondTrust Remote Support and Privileged Remote Access
Description
BeyondTrust Remote Support and Privileged Remote Access contain a high-severity pre-authentication vulnerability in the network communication subsystem. Insufficient validation of client-supplied input may allow an unauthenticated remote attacker to trigger a denial-of-service condition affecting appliance availability.
INFO
Published Date :
July 6, 2026, 5:16 p.m.
Last Modified :
July 6, 2026, 5:16 p.m.
Remotely Exploit :
Yes !
Source :
13061848-ea10-403d-bd75-c83a022c2891
Affected Products
The following products are affected by CVE-2026-40140
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 4.0 | HIGH | 13061848-ea10-403d-bd75-c83a022c2891 | ||||
| CVSS 4.0 | HIGH | 13061848-ea10-403d-bd75-c83a022c2891 |
Solution
- Update BeyondTrust Remote Support and Privileged Remote Access.
- Apply vendor-provided security patches promptly.
- Validate network communication subsystem security.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-40140.
| URL | Resource |
|---|---|
| https://www.beyondtrust.com/trust-center/security-advisories/bt26-03 |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-40140 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-40140
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-40140 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-40140 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
New CVE Received by 13061848-ea10-403d-bd75-c83a022c2891
Jul. 06, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'BeyondTrust', 'product': 'Remote Support', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '26.2.1', 'versionType': 'custom'}, {'status': 'affected', 'version': '0', 'lessThan': '25.3.3', 'versionType': 'custom'}], 'defaultStatus': 'unaffected'}, {'vendor': 'BeyondTrust', 'product': 'Privileged Remote Access', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '26.2.1', 'versionType': 'custom'}, {'status': 'affected', 'version': '0', 'lessThan': '25.3.3', 'versionType': 'custom'}], 'defaultStatus': 'unaffected'}] Added Description BeyondTrust Remote Support and Privileged Remote Access contain a high-severity pre-authentication vulnerability in the network communication subsystem. Insufficient validation of client-supplied input may allow an unauthenticated remote attacker to trigger a denial-of-service condition affecting appliance availability. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CWE CWE-400 Added Reference https://www.beyondtrust.com/trust-center/security-advisories/bt26-03