BeyondTrust Remote Support (RS) and Privileged Remote Access (PRA) OS Command Injection
CVE-2026-1731 is a critical-severity improper neutralization of special elements used in an OS command vulnerability in Remote Support(RS) & Privileged Remote Access(PRA) from BeyondTrust, with a CVSS 3.1 base score of 9.8 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. Affected Remote Support(RS) & Privileged Remote Access(PRA) versions: RS 25.3.1 and earlier; PRA 24.3.4 and earlier. The record does not name a fixed version, so check the vendor advisory. CISA added it to the Known Exploited Vulnerabilities catalogue on February 13, 2026, which means attacks have been observed in the wild, including in ransomware campaigns.
Attackers are already exploiting this vulnerability, according to CISA.
What to do
- Update Privileged Remote Access to 25.1 or a later version.
- Update Remote Support to 25.3.2 or a later version.
- CISA's required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
- Read the advisory on beyondtrust.com for workarounds and exact fixed builds.
- Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| BeyondTrust | Remote Support(RS) & Privileged Remote Access(PRA) | RS 25.3.1 and earlier; PRA 24.3.4 and earlier | Not stated |
| Beyondtrust | Privileged Remote Access | before 25.1 | 25.1 |
| Beyondtrust | Remote Support | before 25.3.2 | 25.3.2 |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- NoneNo account or login is needed.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- HighData or code can be modified at will.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 4.0 | 9.9 | Critical | CNA |
| CVSS 3.1 | 9.8 | Critical | NVD |
Official 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.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Improper Neutralization of Special Elements used in an OS Command
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 before it is sent to a downstream component.
How developers prevent this class of flaw
- If at all possible, use library calls rather than external processes to recreate the desired functionality.
- For any data that will be used to generate a command to be executed, keep as much of that data out of external control as possible. For example, in web applications, this may require storing the data locally in the session's state instead of sending it out to the client in a hidden form field.
- For any security checks that are performed on the client side, ensure that these checks are duplicated on the server side, in order to avoid CWE-602. Attackers can bypass the client-side checks by modifying values after the checks have been performed, or by changing the client to remove the client-side checks entirely. Then, these modified values would be submitted to the server.
More Improper Neutralization of Special Elements used in an OS Command vulnerabilities (CWE-78)
Timeline
- CVE record published.
- Added to CISA's Known Exploited Vulnerabilities catalogue.
- CISA published its SSVC assessment (exploitation: active, automatable: yes, technical impact: total).
- Deadline for US federal agencies to remediate, set by CISA.
- Record last changed materially (score, affected products, status or references).
References
Third-party and government advisories
- cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-1731US Government Resource
- greynoise.io/blog/reconnaissance-beyondtrust-rce-cve-2026-1731Third Party Advisory
Technical write-ups (may include proof of concept)
- github.com/win3zz/CVE-2026-1731Exploit, Third Party Advisory
Other references
- beyondtrustcorp.service-now.com/csm?id=csm_kb_article&sysparm_article=KB0023293Permissions Required
Other vulnerabilities in Remote Support(RS) & Privileged Remote Access(PRA)
- 9.8 Critical severity
- 7.2 High severity
Recent Improper Neutralization of Special Elements used in an OS Command vulnerabilities
- 9.9 Critical severity
- 8.4 High severity
- 9.1 Critical severity
- 7.2 High severity
- 8.8 High severity
- 7.2 High severity
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