Summary
Successful exploitation of this vulnerability could allow an attacker to view transmitted data and use that data to log into the device.
The following versions of InterSystems Corporation InterSystems IRIS for Health are affected:
- InterSystems IRIS for Health 2026.2.0.221, 2026.1.0.235, 2025.3.0.226 (CVE-2026-111594, CVE-2026-111594, CVE-2026-111594)
CVSS
Vendor
Equipment
v3 8.1
InterSystems Corporation
InterSystems IRIS for Health
1 Vulnerability
Cleartext Transmission of Sensitive Information
Background
- Critical Infrastructure Sectors: Healthcare and Public Health
- Countries/Areas Deployed: Worldwide
- Company Headquarters Location: United States
Vulnerabilities
CVE-2026-111594
InterSystems IRIS for Health has TLS/SSL encryption turned off by default, which may enable an attacker to view transmitted data and use that data to log into the device.
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3 Affected Products
InterSystems Corporation InterSystems IRIS for Health: 2026.2.0.221
Product Status: known_affected
Remediations
Mitigation
InterSystems recommends users configure IRIS superserver to require SSL/TLS: https://docs.intersystems.com/irislatest/csp/docbook/DocBook.UI.Page.cls?KEY=ROARS_gsecuring_checklist Note that there are three settings: "Disabled", which means that client communications do not use TLS. "Enabled", which means that client communications may use TLS (but they also may not) and "Required", which forces all client communications to use TLS.
Mitigation
InterSystems documentation explains how to configure the server to require TLS: https://docs.intersystems.com/irislatest/csp/docbook/DocBook.UI.Page.cls?KEY=GSA_manage_superserver
Mitigation
For more information about how to configure a system to mitigate this vulnerability, contact InterSystems at their world wide response center: https://wrc.intersystems.com (login required)
InterSystems Corporation InterSystems IRIS for Health: 2026.1.0.235
Product Status: known_affected
Remediations
Mitigation
InterSystems recommends users configure IRIS superserver to require SSL/TLS: https://docs.intersystems.com/irislatest/csp/docbook/DocBook.UI.Page.cls?KEY=ROARS_gsecuring_checklist Note that there are three settings: "Disabled", which means that client communications do not use TLS. "Enabled", which means that client communications may use TLS (but they also may not) and "Required", which forces all client communications to use TLS.
Mitigation
InterSystems documentation explains how to configure the server to require TLS: https://docs.intersystems.com/irislatest/csp/docbook/DocBook.UI.Page.cls?KEY=GSA_manage_superserver
Mitigation
For more information about how to configure a system to mitigate this vulnerability, contact InterSystems at their world wide response center: https://wrc.intersystems.com (login required)
InterSystems Corporation InterSystems IRIS for Health: 2025.3.0.226
Product Status: known_affected
Remediations
Mitigation
InterSystems recommends users configure IRIS superserver to require SSL/TLS: https://docs.intersystems.com/irislatest/csp/docbook/DocBook.UI.Page.cls?KEY=ROARS_gsecuring_checklist Note that there are three settings: "Disabled", which means that client communications do not use TLS. "Enabled", which means that client communications may use TLS (but they also may not) and "Required", which forces all client communications to use TLS.
Mitigation
InterSystems documentation explains how to configure the server to require TLS: https://docs.intersystems.com/irislatest/csp/docbook/DocBook.UI.Page.cls?KEY=GSA_manage_superserver
Mitigation
For more information about how to configure a system to mitigate this vulnerability, contact InterSystems at their world wide response center: https://wrc.intersystems.com (login required)
Additional Metrics
Relevant CWE: CWE-319 Cleartext Transmission of Sensitive Information
CVSS Version
Base Score
Base Severity
Vector String
3.1
8.1
HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
4.0
9.2
CRITICAL
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
Acknowledgments
- Abhinav Agarwal reported this vulnerability to CISA and InterSystems Corporation.
Recommended Practices
CISA recommends users take defensive measures to minimize the risk of exploitation of these vulnerabilities.
- Minimize network exposure for all control system devices and/or systems, ensuring they are not accessible from the internet.
- Locate control system networks and remote devices behind firewalls and isolating them from business networks.
- When remote access is required, use more secure methods, such as Virtual Private Networks (VPNs), recognizing VPNs may have vulnerabilities and should be updated to the most current version available. Also recognize VPN is only as secure as the connected devices.
CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.
CISA also provides a section
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