CVE-2026-40139
Critical Pre-Authentication Vulnerability in BeyondTrust Remote Support and Privileged Remote Access
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.
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-2026-40139
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 | CRITICAL | 13061848-ea10-403d-bd75-c83a022c2891 | ||||
| CVSS 4.0 | CRITICAL | 13061848-ea10-403d-bd75-c83a022c2891 |
Solution
- Disable specific authentication configuration if enabled.
- Apply vendor updates or patches when available.
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-2026-40139.
| 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-2026-40139 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-2026-40139
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-2026-40139 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-40139 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 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. Added CVSS V4.0 AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/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-287 Added Reference https://www.beyondtrust.com/trust-center/security-advisories/bt26-03