Security readout for executives and security teams
Plain-English summary
CVE-2026-1731 is a critical BeyondTrust Remote Support and older Privileged Remote Access flaw that can let an unauthenticated remote attacker run operating system commands. These products often provide high-trust remote access, so compromise could create serious operational and security impact. The provided sources do not identify exact affected versions or a specific fix in the bundle.
Executive priority
Treat as same-day priority for any exposed BeyondTrust RS or PRA environment. The business risk is high because remote access tooling can become a privileged entry point. Ask teams to verify exposure, follow vendor guidance, and report remediation status quickly.
Technical view
The CVE describes pre-authentication remote code execution in BeyondTrust Remote Support and certain older Privileged Remote Access versions. The weakness is CWE-78 command injection. CVSS 4.0 is 9.9, with network attack vector, low complexity, no privileges, and no user interaction. Execution occurs in the context of the site user.
Likely exposure
Highest concern is internet-facing BeyondTrust RS or PRA appliances/instances, especially older PRA deployments. Exact affected version ranges are not available in the provided bundle, so inventory must be matched against BeyondTrust’s advisory and KB.
Exploitation context
The source bundle includes a public GitHub reference tagged as exploit and a GreyNoise article indicating reconnaissance activity. CISA KEV status is false in the bundle, so active exploitation is not confirmed here. Treat exposure as urgent because exploitation requires no authentication and can lead to command execution.
Researcher notes
Evidence is strong for severity and vulnerability class from the CVE data. Evidence is incomplete for exact affected versions and fixes in the supplied bundle. Do not assume KEV-listed exploitation; the bundle marks KEV false. Public exploit and reconnaissance references increase urgency but do not by themselves confirm compromise.
Mitigation direction
- Identify all BeyondTrust RS and PRA deployments, including externally exposed instances.
- Review BeyondTrust advisory BT26-02 and KB0023293 for affected versions and remediation.
- Prioritize vendor-recommended updates or mitigations for internet-facing systems.
- Restrict external access where business processes allow until remediation is confirmed.
- Monitor BeyondTrust and CISA pages for updated exploitation or remediation guidance.
Validation and detection
- Confirm product type and version for every BeyondTrust RS and PRA instance.
- Check whether each instance matches vendor-listed affected versions.
- Verify internet exposure through asset inventory and external attack surface tools.
- Review logs for unusual unauthenticated request patterns or command execution indicators.
- Document remediation status and compensating controls for each deployment.
Public sources used
Michael Williams reviewed this cited source version on .
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-78: Command execution behavior lookup
Command injection weaknesses can lead defenders to review execution techniques and command interpreter telemetry. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2026-1731 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Critical
- CVSS
- 9.9 (4.0)
- Known Exploited
- Yes
- Published
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
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CISA KEV status
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
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——Primary CVE scoreVulnerability scoring details
Base CVSS 4.0 score
9.9CriticalVector: 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
Source materials
- CVE List V5 sourceCVE List V5
- https://beyondtrustcorp.service-now.com/csm?id=csm_kb_article&sysparm_article=KB0023293CVE reference
- https://www.beyondtrust.com/trust-center/security-advisories/bt26-02CVE reference
- https://github.com/win3zz/CVE-2026-1731CVE reference · exploit
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-1731CVE reference · government-resource
- https://www.greynoise.io/blog/reconnaissance-beyondtrust-rce-cve-2026-1731CVE reference · third-party-advisory
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.