---
title: "CVE-2026-102764: BeyondTrust Remote Support Authentication Bypass by Spoofing Vulnerability"
url: https://erroneo.us/security/cve/CVE-2026-102764/
description: "CVE-2026-102764 (BeyondTrust Remote Support): Exploited in the wild (CISA KEV). The vulnerability exists within internal components of BeyondTrust’s Remote…"
type: vulnerability-record
section: "Security Digest"
date_published: 2026-10-15
date_modified: 2026-10-17
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2026-102764"
kev: true
cvss: 9.3
epss: 0.0118
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2026-102764: BeyondTrust Remote Support Authentication Bypass by Spoofing Vulnerability

**Signal:** Exploited: patch now if you run it. CISA has confirmed exploitation in the wild. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- Yes, if you run BeyondTrust Remote Support. CISA added this CVE to its Known Exploited Vulnerabilities catalog on 2026-10-16, which means there is reliable evidence of exploitation in the wild. US federal agencies must remediate by 2026-10-19 ; treat that as the outer limit, not the target.
- EPSS 1.2% , percentile 67: FIRST’s model estimates a 1.2% chance of exploitation activity in the next 30 days, higher than 67% of all scored CVEs (moderate). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- Editorial verdict: Act now. BeyondTrust Remote Support CVE-2026-102764 Zero-Day — If you run a self-hosted BeyondTrust Remote Support appliance, patch it today and assume it may already be compromised; an espionage group used this as a zero-day for about seven weeks.

## What it is

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.

## Affected products (CVE record)

- BeyondTrust Remote Support: <= 26.2.3

## Severity

- BT CVSS 4.0: 9.3 `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`

## Exploitation

- CISA KEV: added 2026-10-16; federal due date 2026-10-19. Known ransomware use: Unknown.
- CISA 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.
- CISA SSVC assessment: exploitation active , automatable yes , technical impact total .
- FIRST EPSS (model of 2026-10-21): 1.18% probability of exploitation activity in the next 30 days; percentile 67.

## Sources

- [Listed in CISA KEV notes (beyondtrust.com)](https://www.beyondtrust.com/trust-center/security-advisories/bt26-05)
- [CVE.org record CVE-2026-102764](https://www.cve.org/CVERecord?id=CVE-2026-102764)
- [NVD entry CVE-2026-102764](https://nvd.nist.gov/vuln/detail/CVE-2026-102764)
- [CISA Known Exploited Vulnerabilities catalog entry](https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-102764)
- [Listed in CISA KEV notes (cisa.gov)](https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk)
- [Listed in CISA KEV notes (cisa.gov)](https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk)
- [beyondtrust.com](https://www.beyondtrust.com/blog/entry/bt26-05)
- [beyondtrustcorp.service-now.com](https://beyondtrustcorp.service-now.com/csm?id=csm_kb_article&sysparm_article=KB0024066)

---
Source page: https://erroneo.us/security/cve/CVE-2026-102764/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt