How severe is CVE-2026-40140?

CVE-2026-40140 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2026-40140 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-40140?

CVE-2026-40140 primarily affects Beyondtrust Privileged Remote Access. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-40140?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2026-40140 published?

CVE-2026-40140 was published on 2026-07-06 and last updated on 2026-07-07.

CVE-2026-40140

CVE-2026-40140 is a high-severity vulnerability in Beyondtrust Privileged Remote Access with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-400.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v4: 8.7
EPSS exploit prediction: 1% (43rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-400
Affected product: Beyondtrust Privileged Remote Access
Published: 2026-07-06
Last modified: 2026-07-07

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.

Frequently asked questions

What is CVE-2026-40140?: 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.
How severe is CVE-2026-40140?: CVE-2026-40140 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2026-40140 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-40140?: CVE-2026-40140 primarily affects Beyondtrust Privileged Remote Access. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-40140?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2026-40140 published?: CVE-2026-40140 was published on 2026-07-06 and last updated on 2026-07-07.

References

https://www.beyondtrust.com/trust-center/security-advisories/bt26-03

Affected products (2)

cpe:2.3:a:beyondtrust:privileged_remote_access:*:*:*:*:*:*:*:*
cpe:2.3:a:beyondtrust:remote_support:*:*:*:*:*:*:*:*

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