BeyondTrust Remote Support Authentication Bypass by Spoofing Vulnerability
The vulnerability exists within internal components of BeyondTrust’s Remote Support product. The components did not adequately validate the origin of the messages it received. Under the right conditions, this could allow an attacker to…
Severity = CVSS. Probability = EPSS (FIRST). Exploitation = public signals: KEV, EUVD, ransomware, EPSS above 10 %, no account required.
Exploitation probability EPSS · FIRST
Exploitation signals 4 / 5
- KEV catalog (CISA)16 Oct 2026
- Exploited in EUVD (ENISA)16 Oct 2026
- Used by ransomwareno
- EPSS above 10 %19.0%
- No account, over the networkyes
What to do
Fix
Apply the vendor’s fix as soon as it is available.
CISA guidance: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
Meanwhile
Take the service off the internet or restrict access to it, watch the logs and look for signs of compromise.
Manufacturers (CRA)
Exploited vulnerability in your product: early warning to ENISA within 24 h, then notification within 72 h (Article 14 of the Cyber Resilience Act). The CRA explained
Description ENISA EUVD
The vulnerability exists within internal components of BeyondTrust’s Remote Support product. The components did not adequately validate the origin of the messages it received. Under the right conditions, this could allow an attacker to perform file operations on the appliance.
Affected products
- 0 ≤26.2.3
Open source packages OSV
Affected libraries according to OSV, with fixed versions.
Timeline
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Published
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Exploitation reported (ENISA)
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Added to the KEV catalog
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CISA remediation due date
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EPSS peak: 20.3%
References
Other exploited vulnerabilities from the same vendor
- CVE-2026-1731BeyondTrust Remote Support (RS) and Privileged Remote Access (PRA) OS Command Injection Vulnerability9.8 · Background exploitation
- CVE-2024-12686BeyondTrust Privileged Remote Access (PRA) and Remote Support (RS) OS Command Injection Vulnerability5.4 · Background exploitation
- CVE-2024-12356BeyondTrust Privileged Remote Access (PRA) and Remote Support (RS) Command Injection Vulnerability8.9 · Background exploitation