CVE-2026-1731: BeyondTrust Remote Support (RS) and Privileged Remote Access (PRA) OS Command Injection Vulnerability

Vulnerability summary

CVE-2026-1731 is a critical (CVSS 9.9) OS Command Injection vulnerability in BeyondTrust Remote Support (RS) and Privileged Remote Access (PRA). It is known to be exploited: CISA and ENISA list it, first on 13-02-2026. It has been used in ransomware campaigns. EPSS estimates a 92.46% chance of exploitation in the next 30 days, higher than 99.8% of scored vulnerabilities. 2 public exploits are recorded.

Timeline

1. 06-02-2026
   PublishedVulnerability first disclosed.
2. 13-02-2026
   Added to CISA KEVBeyondTrust Remote Support (RS) and Privileged Remote Access (PRA) OS Command Injection Vulnerability
3. 16-02-2026
   CISA remediation dueApply mitigations per vendor instructions.
4. 26-02-2026
   Last modifiedVulnerability information updated.
5. 04-06-2026
   Added to ENISA KEVAdded to the ENISA known exploited vulnerabilities catalog.

Description

BeyondTrust Remote Support (RS) and certain older versions of Privileged Remote Access (PRA) contain a critical pre-authentication remote code execution vulnerability. By sending specially crafted requests, an unauthenticated remote attacker may be able to execute operating system commands in the context of the site user.

• CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.