CVE-2026-40138: A critical pre-authentication vulnerability exists in the authentication subsystem of BeyondTrust Remote Suppo

Q: How do I fix CVE-2026-40138?

privileged remote access: upgrade to 25.3.3; remote support: upgrade to 25.3.3. Exact commands for each OS are on this page.

Q: Is CVE-2026-40138 being exploited?

CVE-2026-40138 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-40138 affect?

CVE-2026-40138 affects privileged remote access, remote support. Severity is high (CVSS 8.1). A critical pre-authentication vulnerability exists in the authentication subsystem of BeyondTrust Remote Support and Privileged Remote Access. Improper validation of authentication data may allow a network-positioned attacker to bypass acce

Q: How urgent is CVE-2026-40138?

Priority 43/100. High severity; Remotely exploitable, no login, no user action

This month

HIGH 8.1REMOTEUPGRADEUPGRADE

CVE-2026-40138 is a high-severity flaw (CVSS 8.1) affecting privileged remote access, remote support. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A critical pre-authentication vulnerability exists in the authentication subsystem of BeyondTrust Remote Support and Privileged Remote Access. Improper validation of authentication data may allow a network-positioned 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

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	8.1 (High)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	0.5% (top 60%)
CISA exploited list	No
Weakness	CWE-287
Published	2026-07-06
Last modified	2026-07-07

Publisher (CNA): BeyondTrust · Vendor: beyondtrust

Last updated 2026-07-07 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-07-06 17:16 UTCPublished CVE record published
2026-07-07 16:16 UTCUpdated Record last modified

beyondtrust privileged remote access UPGRADE

Affected: < 25.3.3

Fixed in: 25.3.3

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy privileged-remote-access || rpm -q privileged-remote-access || privileged-remote-access --version

2. UPGRADE to 25.3.3 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade privileged-remote-access

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade privileged-remote-access

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

beyondtrust remote support UPGRADE

Affected: < 25.3.3

Fixed in: 25.3.3

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy remote-support || rpm -q remote-support || remote-support --version

2. UPGRADE to 25.3.3 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade remote-support

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade remote-support

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-40138?

privileged remote access: upgrade to 25.3.3; remote support: upgrade to 25.3.3. Exact commands for each OS are on this page.

Is CVE-2026-40138 being exploited?

CVE-2026-40138 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-40138 affect?

CVE-2026-40138 affects privileged remote access, remote support. Severity is high (CVSS 8.1). A critical pre-authentication vulnerability exists in the authentication subsystem of BeyondTrust Remote Support and Privileged Remote Access. Improper validation of authentication data may allow a network-positioned attacker to bypass acce

How urgent is CVE-2026-40138?

Priority 43/100. High severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2026-40141 CRITICAL 9.9 UPGRADE UPGRADE A high-severity vulnerability exists in a web application component of BeyondTrust Remote Support and Privileg
CVE-2026-40140 HIGH 7.5 UPGRADE UPGRADE BeyondTrust Remote Support and Privileged Remote Access contain a high-severity pre-authentication vulnerabili
CVE-2026-40139 CRITICAL 9.8 UPGRADE UPGRADE A critical pre-authentication vulnerability exists in the authentication subsystem of BeyondTrust Remote Suppo

References

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