Loading vulnerability…
CVE-2026-40140 is a high-severity pre-authentication vulnerability affecting BeyondTrust Remote Support (RS) and Privileged Remote Access (PRA). The flaw resides in the network communication subsystem and is caused by insufficient validation of client-supplied input. A remote, unauthenticated attacker can send crafted input to the affected subsystem and trigger a denial-of-service condition, disrupting normal processing and reducing or preventing appliance availability. Affected versions include RS and PRA 25.3.2 and earlier; fixed versions are 25.3.3 and later, with the April 2026 Security Rollup also reported to remediate supported branches.
Mallory correlates every CVE against your assets, your vendors, and active adversary campaigns. Know which vulnerabilities matter for you, not just which ones are loud.
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
16 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A high-severity vulnerability in BeyondTrust RS/PRA that could lead to denial-of-service or access to restricted resources.
A pre-authentication denial-of-service vulnerability in the BeyondTrust network communication subsystem that allows unauthenticated remote attackers to trigger resource exhaustion and affect appliance availability.
A high-severity pre-authentication denial-of-service vulnerability in the network communication subsystem of BeyondTrust RS/PRA caused by insufficient validation of client-supplied input.
A high-severity pre-authentication denial-of-service vulnerability in the network communication subsystem of affected BeyondTrust products that could let attackers disrupt service availability.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.