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

highCVSS 7.5CVE-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.

Details

Source: NVD Recent CVEs (US · database · site)
Severity: high — CVSS 7.5
Published: 2026-07-06
Last updated: 2026-07-07
Exploitation: Not in CISA KEV at last sync

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-40140

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-401400.56% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 43% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-40140	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

Recent advisories for BeyondTrust Remote Support

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

unknownNCSC-2026-0223 [1.00] [M/H] Vulnerabilities fixed in BeyondTrust Remote Support and Privileged Remote Accessncsc-nl · 2026-07-10
high[NEW] [high] BeyondTrust Privileged Remote Access and Remote Support: Multiple vulnerabilitiescert-bund · 2026-07-08
criticalCVE-2026-40141: A high-severity vulnerability exists in a web application component of BeyondTrust Remote Supp…nvd · 2026-07-06
criticalCVE-2026-40139: A critical pre-authentication vulnerability exists in the authentication subsystem of BeyondTr…nvd · 2026-07-06
highCVE-2026-40138: A critical pre-authentication vulnerability exists in the authentication subsystem of BeyondTr…nvd · 2026-07-06
criticalexploitedCVE-2026-1731: BeyondTrust Remote Support (RS) and Privileged Remote Access (PRA) OS Command Injection Vulnera…cisa-kev · 2026-02-13