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Vulnerability record · CVE-2026-0611 · published 2 June 2026

CVE-2026-0611: Missing authentication for critical function vulnerability

Spacelabs Healthcare Sentinel versions 10.5.x and higher and 11.x.x before 11.6.0 contain an unauthenticated remote code execution vulnerability through a deprecated .NET Remoting HTTP channel exposed on port 8989 that allows attackers to perform arbitrary file read and write operations by supplying valid .NET URI endpoints. Attackers can write ASPX webshells to the IIS wwwroot directory to achieve unauthenticated remote code execution on the system. Port 8989 is not exposed in a default Sentinel installation; exploitation requires that the .NET Remoting port has been explicitly made network-accessible through deliberate configuration or network policy changes.

9.2 CVSS 4.0 Critical EPSS 0.66% · top 50.3% CWE-306 · Missing authentication for critical function Deferred
9.2CVSS 4.0 base score
0.66%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
4References
22 Jul 2026Last modified by NVD

Description

Spacelabs Healthcare Sentinel versions 10.5.x and higher and 11.x.x before 11.6.0 contain an unauthenticated remote code execution vulnerability through a deprecated .NET Remoting HTTP channel exposed on port 8989 that allows attackers to perform arbitrary file read and write operations by supplying valid .NET URI endpoints. Attackers can write ASPX webshells to the IIS wwwroot directory to achieve unauthenticated remote code execution on the system. Port 8989 is not exposed in a default Sentinel installation; exploitation requires that the .NET Remoting port has been explicitly made network-accessible through deliberate configuration or network policy changes.

CVSS:4.0/AV:N/AC:L/AT:P/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:

References

LinkTags
https://spacelabshealthcare.com/products/diagnostic-cardiology/connectivity/sentinel
https://spacelabshealthcare.com/wp-content/uploads/2026/06/079-0273-00-RevA-Security-Advisory-Sentinel-.NET-Remoting-Vul
https://www.vulncheck.com/advisories/spacelabs-healthcare-sentinel-x-unauthenticated-rce-via-net-remoting
https://spacelabshealthcare.com/wp-content/uploads/2026/06/079-0273-00-RevA-Security-Advisory-Sentinel-.NET-Remoting-Vul

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Source: NIST National Vulnerability Database (record CVE-2026-0611), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.