CVEs / CVE-2026-102764
CVE-2026-102764: BeyondTrust Remote Support Authentication Bypass by Spoofing Vulnerability
- Known exploited in the CISA KEV catalog since 16 Oct 2026
- critical 9.8 CVSS 3.1 (NVD)
- EPSS 18.9% chance of exploitation in the next 30 days, higher than 97% of CVEs (30 Oct 2026)
- Last changed at its sources
Are you affected? Check your servers with Stackurity: it lists the software on each server and the vulnerabilities to fix first.
Check your servers with Stackurity Already using Stackurity? Search for CVE-2026-102764
Summary
BeyondTrust Remote Support contains an authentication bypass by spoofing vulnerability that could allow a remote attacker to perform file operations on the appliance.
Description
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 and fixed versions
| Product | Affected | Fixed in |
|---|---|---|
| BeyondTrust Remote Support | up to and including 26.2.3 | — |
Exploitation
| In CISA KEV since | 16 Oct 2026 |
|---|---|
| Due date for US federal agencies | 19 Oct 2026 |
| Used in ransomware campaigns | Unknown |
| 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. |
Severity
| CVSS 3.1 | 9.8 criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HScored by NVD |
|---|---|
| Weakness | CWE-290 |
References
- CVE-2026-102764 on NVD
- CVE-2026-102764 in the CISA KEV catalog
- https://www.beyondtrust.com/trust-center/security-advisories/bt26-05 (cited by CISA)
- https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk (cited by CISA)
- https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk (cited by CISA)
- https://beyondtrustcorp.service-now.com/csm?id=csm_kb_article&sysparm_article=KB0024066 Permissions Required
- https://nvd.nist.gov/vuln/detail/CVE-2026-102764 US Government Resource
- https://www.beyondtrust.com/blog/entry/bt26-05 Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-102764 US Government Resource
Sources
Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.
This product uses data from the NVD API but is not endorsed or certified by the NVD.