Threat Intelligence / CVE / CVE-2026-1731

CVE-2026-1731 — Beyondtrust Privileged Remote Access

CISA KEVRansomware
CVSS v3.1 9.8 (CRITICAL) · CVSS v4.0 9.9 · EPSS 79.6% (higher than 99.0% of all scored CVEs) · Priority 10/10 · Published 2026-02-06

As of 2026-02-17, CVE-2026-1731 is a CRITICAL-severity vulnerability in Beyondtrust Privileged Remote Access, CVSS v3.1 9.8, EPSS 79.6% (99.0th percentile). It is listed in the CISA Known Exploited Vulnerabilities catalog (added 2026-02-13), with a US federal remediation deadline of 2026-02-16, and CISA links it to known ransomware campaigns. Threadlinqs Intelligence links 4 tracked threat campaigns to CVE-2026-1731, most recently “Storm-1175 Medusa Ransomware Zero-Day Exploitation Campaign (CVE-2026-23760, CVE-2025-10035)”.

Last updated: 2026-02-17

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 219 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)
79.6% probability of exploitation in the next 30 days, higher than 99.0% 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 2026-02-17

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. It currently carries a trending score of 45 in the Threadlinqs vulnerability feed.

Affected products and versions

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

4 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.

Sources

Seeded from nvd and not yet processed by the Threadlinqs enrichment pipeline, so blank CVSS, EPSS or KEV fields above mean NOT MEASURED rather than measured-absent.

Full detection coverage & IOCs for threats exploiting CVE-2026-1731 are available via the Threadlinqs MCP server (Purple tier). View plans →

← all vulnerabilities · Markdown version · Threadlinqs Intelligence