High severity · published Oct 22, 2026
CVE-2026-111594
InterSystems Corporation InterSystems IRIS for Health Cleartext Transmission of Sensitive Information
New
8.1
CVSS
0.2%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 9% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
IF
IRIS for Health · InterSystems
2026.2.0.221; 2026.1.0.235; 2025.3.0.226 · source: vendor
In the news
VulnerabilityHigh
InterSystems Corporation InterSystems IRIS for Health
View CSAF
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.
Read More
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 T...
Oct 22, 2026·CISA Advisories
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-111594
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-111594
docs.intersystems.com
https://docs.intersystems.com/irislatest/csp/docbook/DocBook.UI.Page.cls?KEY=GSA_manage_superserver
docs.intersystems.com
https://docs.intersystems.com/irislatest/csp/docbook/DocBook.UI.Page.cls?KEY=ROARS_gsecuring_checklist
github.com
https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsma-26-295-01.json
wrc.intersystems.com
https://wrc.intersystems.com
www.cisa.gov
https://www.cisa.gov/news-events/ics-medical-advisories/icsma-26-295-01
