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

In short

BeyondTrust Remote Support (RS) and Privileged Remote Access (PRA) has a weakness classified as OS command injection (CWE-78). CISA added it to its Known Exploited Vulnerabilities catalog on 2026-02-13. NVD lists CVSS 4.0 at 9.9 CRITICAL. CISA reports known ransomware campaign use.

What it is

“BeyondTrust Remote Support (RS) and Privileged Remote Access (PRA)contain an OS command injection vulnerability. Successful exploitation could allow an unauthenticated remote attacker to execute operating system commands in the context of the site user. Successful exploitation requires no authentication or user interaction and may lead to system compromise, including unauthorized access, data exfiltration, and service disruption.” — CISA KEV, retrieved 2026-11-01

“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.” — NVD, retrieved 2026-11-01

Who is affected

BeyondTrust Remote Support (RS) and Privileged Remote Access (PRA). NVD lists the following versions as affected:

• Beyondtrust Privileged Remote Access: before 25.1
• Beyondtrust Remote Support: before 25.3.2

Exploitation status

CISA KEV added: 2026-02-13. Known ransomware campaign use: Known (reported by CISA). Due date CISA set for US federal civilian agencies: 2026-02-16.

Scores

NVD CVSS 4.0: 9.9 CRITICAL; vector CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:H/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X; source 13061848-ea10-403d-bd75-c83a022c2891.

EPSS by FIRST: 93.10%; percentile 99.83; score date 2026-10-31. EPSS estimates the probability of exploitation in the next 30 days.

CWE: CWE-78.

Timeline

CISA 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.” — CISA KEV

What to do

• Confirm whether you run BeyondTrust Remote Support (RS) and Privileged Remote Access (PRA) and which version.
• Apply the vendor update or mitigation in the advisory.
• Follow CISA’s required action.
• Review the vendor guidance on signs of compromise.
• Track the fix through completion.

References

• Vendor Advisory: https://www.beyondtrust.com/trust-center/security-advisories/bt26-02
• Third Party Advisory: https://www.greynoise.io/blog/reconnaissance-beyondtrust-rce-cve-2026-1731
• NVD detail
• CVE.org record
• CISA KEV catalog

Sources and dates

CISA Known Exploited Vulnerabilities Catalog, version 2026.10.30; retrieved 2026-11-01. CISA KEV data: CC0 1.0. No endorsement by CISA.

NVD retrieved: 2026-11-01. This product uses the NVD API but is not endorsed or certified by the NVD.

EPSS scores by FIRST; score date 2026-10-31.