What is CVE-2026-1731?
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.
The record classifies CVE-2026-1731 under weakness class CWE-78. Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs no user interaction, and has high impact on confidentiality, integrity, availability. 2 affected-product entries are recorded, across 1 vendor, listed below. The identifier was first published 265 days ago.
Severity and exploitation probability
- CVSS v3.1 base score
- 9.8 — CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS v4.0 base score
- 9.9
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 - EPSS (FIRST)
- 91.7% probability of exploitation in the next 30 days, higher than 99.8% of all scored CVEs
- CISA KEV
- Listed since 2026-02-13, federal remediation deadline 2026-02-16 — used in known ransomware campaigns
- Threadlinqs priority
- 10/10 — CISA lists it as used in ransomware, which Threadlinqs scores at the maximum
- Published
- 2026-02-06, last modified 2026-02-26
Is CVE-2026-1731 being exploited?
CISA added CVE-2026-1731 to the Known Exploited Vulnerabilities catalog on 2026-02-13, which means the agency holds evidence of exploitation in the wild; US federal civilian agencies had to remediate it by 2026-02-16 under BOD 22-01. CISA flags the vulnerability as one used in known ransomware campaigns. Weaponised exploit code for CVE-2026-1731 is publicly available. 6 public proof-of-concept repositories are tracked for this identifier. A ProjectDiscovery Nuclei detection template exists (javascript/cves/2026/CVE-2026-1731.yaml). It currently carries a trending score of 55 in the Threadlinqs vulnerability feed.
- win3zz/CVE-2026-1731 (github)
- jakubie07/CVE-2026-1731 (github)
- cybrdude/cve-2026-1731-scanner (github)
- hex0user/CVE-2026-1731 (github)
- ridhinva/beyondtrust-rce-scanner (github)
- trickest/cve (trickest)
Affected products and versions
- Beyondtrust: Privileged Remote Access, Remote Support
How to fix CVE-2026-1731
Vendor advisory: https://www.beyondtrust.com/trust-center/security-advisories/bt26-02. Because CVE-2026-1731 is KEV-listed, US federal civilian agencies were required to apply the vendor fix, or stop using the product, by 2026-02-16. Apply the vendor fix referenced above to every affected product listed in this record, then confirm the running version against the vendor advisory.
Threat activity tracking CVE-2026-1731
7 tracked threats in the Threadlinqs corpus reference CVE-2026-1731, either in the campaign’s CVE list or as an indicator on the campaign record.
- GTIG: AI-Era Vulnerability Discovery and Exploitation Surge — In-the-Wild Exploitation of BeyondTrust CVE-2026-1731, LiteLLM CVE-2026-42271 and Langflow CVE-2026-5027 — CRITICAL · 2026-09-30
- Storm-1175 Medusa Ransomware Zero-Day Exploitation Campaign (CVE-2026-23760, CVE-2025-10035) — CRITICAL · 2026-04-06
- BeyondTrust Remote Support & PRA Pre-Authentication Remote Code Execution via OS Command Injection (CVE-2026-1731) — CRITICAL · 2026-03-07
- Seedworm (MuddyWater) Iranian MOIS APT Campaign Targeting U.S. Critical Infrastructure with Dindoor and Fakeset Backdoors — CRITICAL · 2026-03-06
- BeyondTrust Pre-Auth RCE (CVE-2026-1731) — CVSS 9.9, CISA KEV, WebSocket Command Injection, VShell/SparkRAT, 16K+ Exposed Instances, Multi-Sector Campaign — CRITICAL · 2026-02-21
- CVE-2026-1731 — BeyondTrust Pre-Auth RCE, CVSS 9.8, CISA KEV, Actively Exploited — Unauthenticated OS Command Injection in Remote Support & Privileged Remote Access, SimpleHelp RAT Post-Exploitation, Full Domain Control, Silk Typhoon Predecessor Chain — CRITICAL · 2026-02-16
- Ransomware Threat Landscape 2025-2027 — RaaS Destabilization, Conti Leak Cascade, ESXi Hypervisor Targeting, BYOVD as Standard Prep, Double/Triple Extortion Economics, IAB Vertical Integration, Critical Infrastructure Escalation — CRITICAL · 2026-02-06
Sources
Enriched from CVE.org, NVD, FIRST EPSS, CISA KEV, GitHub Security Advisories, public proof-of-concept repositories, ProjectDiscovery Nuclei. Last verified by Threadlinqs on . This product uses the NVD API but is not endorsed or certified by the NVD.