Improper Origin Validation in Internal Messaging Components of BeyondTrust Remote Support

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-102764
StatePUBLISHED
AssignerBT
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-15 21:17:00 UTC
Updated2026-10-17 04:16:47 UTC
DescriptionThe vulnerability exists within internal components of BeyondTrust’s Remote Support product. The components did not adequately validate the origin of the messages it received. Under the right conditions, this could allow an attacker to perform file operations on the appliance.

Risk And Classification

Primary CVSS: v4.0 9.3 CRITICAL from 13061848-ea10-403d-bd75-c83a022c2891

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/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: 0.779940000 probability, percentile 0.995750000 (date 2026-11-05)

CISA KEV: Listed on 2026-10-16; due 2026-10-19; ransomware use Unknown

Problem Types: CWE-290 | CWE-290 CWE-290 Authentication bypass by spoofing

VersionSourceTypeScoreSeverityVector
4.013061848-ea10-403d-bd75-c83a022c2891Secondary9.3CRITICALCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/C...
4.0CNACVSS9.3CRITICALCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
3.1[email protected]Primary9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v4.0 Breakdown

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
None
User Interaction
None
Confidentiality
High
Integrity
High
Availability
High
Sub Conf.
None
Sub Integrity
None
Sub Availability
None

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/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

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA Known Exploited Vulnerability

VendorBeyondTrust
ProductRemote Support
NameBeyondTrust Remote Support Authentication Bypass by Spoofing Vulnerability
Required ActionApply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
Noteshttps://www.beyondtrust.com/trust-center/security-advisories/bt26-05 ; ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-102764

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Beyondtrust Remote Support All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA BeyondTrust Remote Support affected 26.2.3 custom Not specified

References

ReferenceSourceLinkTags
nvd.nist.gov/vuln/detail/CVE-2026-102764 13061848-ea10-403d-bd75-c83a022c2891 nvd.nist.gov US Government Resource
beyondtrustcorp.service-now.com/csm 13061848-ea10-403d-bd75-c83a022c2891 beyondtrustcorp.service-now.com Permissions Required
www.beyondtrust.com/blog/entry/bt26-05 13061848-ea10-403d-bd75-c83a022c2891 www.beyondtrust.com Vendor Advisory
www.cisa.gov/known-exploited-vulnerabilities-catalog 134c704f-9b21-4f2e-91b3-4a467353bcc0 www.cisa.gov US Government Resource
CVE Program record CVE.ORG www.cve.org canonical
CISA Known Exploited Vulnerabilities catalog CISA www.cisa.gov kev

Additional Advisory Data

SourceTimeEvent
ADP2026-10-16T00:00:00.000ZCVE-2026-102764 added to CISA KEV

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