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BeyondTrust disclosed and fixed CVE-2026-1731, a critical unauthenticated remote code execution flaw affecting Remote Support 25.3.1 and earlier and Privileged Remote Access 24.3.4 and earlier. The vulnerability allows a remote attacker to send crafted client requests and execute system commands on the target appliance as the site user, creating a path to full system compromise, data theft, and service disruption. CSIRT.SK reported the issue carries a CVSS score of 9.9.
BeyondTrust said cloud instances were updated automatically, while organizations running on-premises deployments were told to upgrade to Remote Support 25.3.2 and Privileged Remote Access 25.1.1, or apply the vendor patches BT26-02-RS and BT26-02-PRA. The advisory identifies the flaw as a high-priority risk for enterprises using BeyondTrust remote access and support platforms because exploitation requires no authentication and can result in command execution on exposed systems.
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2 events from the most recent confirmed update back to the earliest known activity.
CSIRT.SK reported the critical BeyondTrust flaw and advised administrators of on-premises instances to upgrade to Remote Support 25.3.2 and Privileged Remote Access 25.1.1 or apply patches BT26-02-RS and BT26-02-PRA. The report also noted that BeyondTrust had already automatically updated cloud instances.
BeyondTrust disclosed and fixed the critical vulnerability CVE-2026-1731 affecting Remote Support and Privileged Remote Access. The flaw allows an unauthenticated remote attacker to send crafted client requests and execute system commands as the site user.
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BeyondTrust released security updates for a **critical pre-authentication remote code execution** vulnerability in *BeyondTrust Remote Support (RS)* and certain older versions of *Privileged Remote Access (PRA)*. Tracked as **CVE-2026-1731** (CVSS **9.9**), the issue is described as an **operating system command injection** that can be triggered via **specially crafted requests** without authentication, allowing an attacker to execute OS commands in the context of the **site user** and potentially enabling **unauthorized access, data exfiltration, and service disruption**. Affected versions include **Remote Support 25.3.1 and earlier** and **Privileged Remote Access 24.3.4 and earlier**. BeyondTrust provided fixes via **RS Patch `BT26-02-RS` / RS 25.3.2+** and **PRA Patch `BT26-02-PRA` / PRA 25.1.1+**, and urged **self-hosted** customers to manually apply updates if not enrolled in automatic updates; older deployments (e.g., RS <21.3 or PRA <22.1) must first upgrade to a supported release line to apply the remediation. BeyondTrust’s **SaaS** instances were patched automatically (reported as completed on **2026-02-02**), reducing exposure primarily to organizations operating **self-managed** installations.
Jun 29, 2026
BeyondTrust disclosed multiple vulnerabilities affecting **Remote Support** and **Privileged Remote Access** appliances, including two critical pre-authentication authentication-bypass flaws tracked as `CVE-2026-40138` and `CVE-2026-40139`. Both issues carry **CVSS 9.2** ratings and can allow remote attackers to gain unauthorized access, including access to elevated-privilege accounts, when a specific authentication configuration is enabled. A separate pre-authentication flaw, `CVE-2026-40140`, was rated **CVSS 8.7** and can be exploited remotely to cause a denial-of-service condition in the network communication subsystem. BeyondTrust also addressed `CVE-2026-40141`, a **CVSS 8.5** vulnerability in a web application component that could let an authenticated low-privilege user access resources or data outside their intended authorization scope. The affected products are **Remote Support 25.3.2 and earlier** and **Privileged Remote Access 25.3.2 and earlier**. The Canadian Centre for Cyber Security urged administrators to review BeyondTrust’s advisory, apply vendor updates, disable the affected authentication configuration where possible, and review access controls and permissions.
Jul 9, 2026
A critical **pre-authentication remote code execution** flaw in BeyondTrust Remote Support and some older versions of Privileged Remote Access, tracked as `CVE-2026-1731`, has been actively exploited against internet-facing systems. The bug is described as an unauthenticated operating system command injection vulnerability that lets attackers execute arbitrary commands on affected servers. BeyondTrust patched its SaaS customers on February 2 and urged self-hosted customers to apply fixes, while **CISA** added the vulnerability to its Known Exploited Vulnerabilities catalog and public exploit code later appeared on GitHub. Incident responders and threat researchers reported a rise in post-exploitation activity across multiple BeyondTrust customers in sectors including **financial services, technology, higher education, legal services, and healthcare**. Palo Alto Networks Unit 42 observed attackers deploying **SparkRAT** and **vShell** backdoors, using remote management and tunneling tools for reconnaissance and persistence, and in some cases conducting environment enumeration and suspected data theft. Censys and other researchers also warned that exposed BeyondTrust instances were reachable from the internet, underscoring the risk of rapid compromise where patches had not been applied.
Jun 29, 2026