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

Vulnerability from cvelistv5 – Published: 2026-10-15 20:30 – Updated: 2026-10-17 03:55
VLAI CISA Shadowserver 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
Shadowserver
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: da855938-98bb-4e7c-91f7-246d5a15b6f5

Vulnerability ID: CVE-2026-102764

Status: Confirmed

Status Updated: 2026-11-05 00:00 UTC

Exploited: Yes

Characteristics
Severity: 93.0
Timestamps
First Seen: 2026-11-03
Asserted: 2026-11-03
Last Seen: 2026-11-05
Scope
Asset Exposure: ['internet-facing']
Notes: Affected: BeyondTrust / Remote Support | Class: remote-access | Severity: Critical (CVSS 9.3) | IoT: no | In CISA KEV: yes | Honeypot connections on 2026-11-05: 32127
Evidence

Type: Honeypot

Signal: In The Wild Attempts

Confidence: 70%

Source: shadowserver

Details
1D 26
Iot no
Feed Shadowserver Foundation honeypot/exploited-vulnerabilities
Type http-scan
Class remote-access
7D Avg 7
Vendor BeyondTrust
30D Avg 1
90D Avg 0
Product Remote Support
Cisa Kev yes
Connections 32127
Observation Date 2026-11-05
Vulnerability Class CVSS
Vulnerability Score 9.3
Vulnerability Severity Critical
References
Created: 2026-11-05 01:00 UTC | Updated: 2026-11-07 01:00 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 
{
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  "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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        }
      },
      "cveMetadata": {
        "assignerOrgId": "13061848-ea10-403d-bd75-c83a022c2891",
        "assignerShortName": "BT",
        "cveId": "CVE-2026-102764",
        "datePublished": "2026-10-15T20:30:32.240Z",
        "dateReserved": "2026-09-29T16:29:20.011Z",
        "dateUpdated": "2026-10-17T03:55:27.214Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Tags
Taxonomy of the tags.




Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • 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

JSON
How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

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    Related by attack behaviour

    Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.