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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.
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6 events from the most recent confirmed update back to the earliest known activity.
CVE-2026-40141 was disclosed as a high-severity vulnerability in a web application component of BeyondTrust Remote Support and Privileged Remote Access. An authenticated attacker with limited privileges could exploit insufficient input validation to access unintended resources or data outside their authorization scope.
CVE-2026-40140 was disclosed as a high-severity pre-authentication vulnerability in BeyondTrust Remote Support and Privileged Remote Access. The network communication flaw can be exploited remotely by an unauthenticated attacker to trigger a denial-of-service condition affecting appliance availability.
CVE-2026-40139 was disclosed as a critical pre-authentication vulnerability in BeyondTrust Remote Support and Privileged Remote Access. Improper processing of authentication requests can let an unauthenticated remote attacker bypass access controls and gain unauthorized access, including elevated-privilege accounts, under a specific authentication configuration.
CVE-2026-40138 was disclosed as a critical pre-authentication vulnerability in BeyondTrust Remote Support and Privileged Remote Access. The flaw allows a network-positioned attacker to bypass access controls and gain unauthorized access, including elevated-privilege accounts, when a specific authentication configuration is enabled.
BeyondTrust published a security advisory addressing vulnerabilities affecting Remote Support version 25.3.2 and prior and Privileged Remote Access version 25.3.2 and prior. The advisory urged customers to review the notice and apply necessary updates.
BeyondTrust said its cloud-hosted Remote Support and Privileged Remote Access customers were automatically patched for the vulnerabilities. The company contrasted this with self-hosted customers, who were told to apply the April 2026 security rollup or upgrade to version 25.3.3 or later.
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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.
Jul 24, 2026
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
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