CVE-2026-102764 (GCVE-0-2026-102764)

Vulnerability from cvelistv5 – Published: 2026-10-15 20:30 – Updated: 2026-10-17 03:55
VLAI CISA Previdian
Title
Improper Origin Validation in Internal Messaging Components of BeyondTrust Remote Support
Summary
The 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.
Severity
9.3 (Critical)
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
SSVC
Exploitation: active Automatable: yes Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-16 00:00 UTC
CWE
  • CWE-290 - Authentication bypass by spoofing
Assigner
BT CNA under the mitre root
CNA scorecard – unranked: 7 records in the last 180 days, 10 needed details
References
Impacted products
Vendor Product Version CPE status
BeyondTrust Remote Support Affected: 0 , ≤ 26.2.3 (custom)
guessed Create a notification for this product.
CISA
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: a78314a4-fcef-4227-9854-abe2f272b931

Vulnerability ID: CVE-2026-102764

Status: Confirmed

Status Updated: 2026-10-16 00:00 UTC

Exploited: Yes

Timestamps
First Seen: 2026-10-16
Asserted: 2026-10-16
Scope
Notes: BeyondTrust Remote Support Authentication Bypass by Spoofing Vulnerability | Affected: BeyondTrust / Remote Support | Description: BeyondTrust Remote Support contains an authentication bypass by spoofing vulnerability that could allow a remote attacker to perform file operations on the appliance. | Required action: Apply 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. | Due date: 2026-10-19 | Known ransomware campaign use (KEV): Unknown | Notes (KEV): https://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
Evidence

Type: Vendor Report

Signal: Successful Exploitation

Confidence: 80%

Source: cisa-kev

Details
Cwes CWE-290
Feed CISA Known Exploited Vulnerabilities Catalog
Product Remote Support
Due Date 2026-10-19
Date Added 2026-10-16
Vendorproject BeyondTrust
Vulnerabilityname BeyondTrust Remote Support Authentication Bypass by Spoofing Vulnerability
Knownransomwarecampaignuse Unknown
References
Created: 2026-10-16 18:00 UTC | Updated: 2026-10-16 18:00 UTC
Previdian
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: e43a806f-d83d-45f3-abca-10194c8b5544

Vulnerability ID: CVE-2026-102764

Status: Confirmed

Status Updated: 2026-10-16 06:20 UTC

Exploited: Yes

Timestamps
First Seen: 2026-10-16
Asserted: 2026-10-16
Scope
Notes: Improper Origin Validation in Internal Messaging Components of BeyondTrust Remote Support | Affected: BeyondTrust / Remote Support | CVSS: 9.3 (CRITICAL) | EPSS: 0.00601 | Used in malware: unknown | Listed 11 hours ahead of CISA KEV | Not yet in CISA KEV: False
Evidence

Type: Public Report

Signal: Successful Exploitation

Confidence: 70%

Source: previdian

Details
Feed Previdian (previdian.com)
Title Improper Origin Validation in Internal Messaging Components of BeyondTrust Remote Support
Cve Id CVE-2026-102764
Vendor BeyondTrust
Ghsa Id None
Product Remote Support
Added Date 2026-10-16T06:20:54.577Z
Cvss Score 9.3
Epss Score 0.00601
Previous Ids
Cvss Severity CRITICAL
Virtual Patch False
Cvss Estimated False
Epss Percentile 0.47647
Used In Malware unknown
Vulnerability Id CVE-2026-102764
Ahead Of Cisa Kev 
{
  "count": 11,
  "unit": "hour"
}
Not Yet In Cisa Kev False
References
Created: 2026-10-17 07:00 UTC | Updated: 2026-10-17 07:00 UTC
Show details on NVD website
To clipboard 

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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

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