Johnson Controls C-CURE 9000 and Victor application server
Multiple critical vulnerabilities discovered in Johnson Controls C-CURE 9000 and Victor application servers.
Summary
Johnson Controls has released advisories for multiple critical vulnerabilities affecting their C-CURE 9000 and Victor application server products. These vulnerabilities, including Server-Side Request Forgery (SSRF) and Execution with Unnecessary Privileges, could allow unauthenticated attackers with network access to achieve remote code execution and impact physical security controls. Affected versions include C-CURE 9000 and Victor <=v2.90_v3.0 and Victor Web <=v7.1. Johnson Controls recommends upgrading to the latest versions and implementing network segmentation, strict firewall rules, and intrusion detection systems.
Full text
ICS Advisory Johnson Controls C-CURE 9000 and Victor application server Release DateJuly 23, 2026 Alert CodeICSA-26-204-01 Related topics: Industrial Control System Vulnerabilities , Industrial Control Systems View CSAF Summary Successful exploitation of these vulnerabilities could allow an attacker with network access to achieve remote code execution. The following versions of Johnson Controls C-CURE 9000 and Victor application server are affected: C-CURE 9000 and victor <=v2.90_v3.0 victor Web <=v7.1 CVSS Vendor Equipment Vulnerabilities v3 9.6 Johnson Controls Johnson Controls C-CURE 9000 and Victor application server Server-Side Request Forgery (SSRF), Execution with Unnecessary Privileges Background Critical Infrastructure Sectors: Critical Manufacturing Countries/Areas Deployed: Worldwide Company Headquarters Location: Ireland Vulnerabilities Expand All + CVE-2026-21655 Under certain circumstances, successful exploitation of this vulnerability could allow an unauthenticated attacker on the adjacent network to achieve arbitrary code execution on the C-CURE 9000 or victor application server, as well as connected clients (e.g., workstations of physical security personnel). Such an attack could impact physical security controls. View CVE Details Affected Products Johnson Controls C-CURE 9000 and Victor application server Vendor:Johnson Controls Product Version:Johnson Controls C-CURE 9000 and victor: <=v2.90_v3.0 Product Status:known_affected Remediations MitigationJohnson Controls recommends the following defensive measures to help reduce the risk of exploitation: (CVE-2026-21655) Upgrade to C-CURE 9000 / victor version 3.20 or later, which addresses the vulnerable deserialization path (LV1.1). Vendor fixNetwork segmentation - Isolate the C-CURE 9000 and victor application servers on a dedicated network segment and restrict access to port 8999 to only authorized systems that require connectivity. MitigationFirewall / access control lists - Implement strict firewall rules to block all unnecessary inbound connections to port 8999 from untrusted network segments. MitigationIntrusion detection / prevention - Deploy IDS/IPS signatures tuned to detect known .NET deserialization exploit payloads (e.g., ysoserial.net patterns) targeting port 8999. MitigationApplication whitelisting - Enforce application whitelisting on application server hosts to prevent unauthorized executables from being launched by the server process. MitigationLeast privilege - Ensure the application server process runs with the minimum privileges necessary, reducing the impact of successful exploitation. MitigationMonitor and audit - Enable detailed logging on application server hosts and monitor for anomalous process creation by SoftwareHouse.CrossFire.Server.exe. MitigationDisable unnecessary services - If the ClientConnectionManager_NF.SynchronousServerNotification callback interface is not required, disable or restrict it to reduce attack surface. MitigationFor more detailed mitigation instructions, please see Johnson Controls Product Security Advisories JCI-PSA-2026-07, JCI-PSA-2026-13, and JCI-PSA-2026-16 at the following location: https://www.johnsoncontrols.com/trust-center/cybersecurity/security-advisorieshttps://www.johnsoncontrols.com/trust-center/cybersecurity/security-advisories Relevant CWE: CWE-918 Server-Side Request Forgery (SSRF) Metrics CVSS Version Base Score Base Severity Vector String 3.1 8.8 HIGH CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H 4.0 8.7 HIGH CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N CVE-2026-21653 Under certain circumstances, successful exploitation of this vulnerability could allow an attacker to forge server-side HTTP requests from the victor Web application. This could be leveraged to interact with internal services running on the host or accessible on the local network, potentially leading to unauthorized information disclosure or lateral movement within the network. View CVE Details Affected Products Johnson Controls C-CURE 9000 and Victor application server Vendor:Johnson Controls Product Version:Johnson Controls victor Web: <v7.0 Product Status:known_affected Remediations Vendor fix(CVE-2026-21653, CVE-2026-34496) Update all victor Web installations to version 7.0 or later, which contains the fix for this vulnerability. The fix has been validated through independent retest. MitigationFirewall / access control lists - Implement strict firewall rules to block all unnecessary inbound connections to port 8999 from untrusted network segments. MitigationIntrusion detection / prevention - Deploy IDS/IPS signatures tuned to detect known .NET deserialization exploit payloads (e.g., ysoserial.net patterns) targeting port 8999. MitigationApplication whitelisting - Enforce application whitelisting on application server hosts to prevent unauthorized executables from being launched by the server process. MitigationLeast privilege - Ensure the application server process runs with the minimum privileges necessary, reducing the impact of successful exploitation. MitigationMonitor and audit - Enable detailed logging on application server hosts and monitor for anomalous process creation by SoftwareHouse.CrossFire.Server.exe. MitigationDisable unnecessary services - If the ClientConnectionManager_NF.SynchronousServerNotification callback interface is not required, disable or restrict it to reduce attack surface. MitigationFor more detailed mitigation instructions, please see Johnson Controls Product Security Advisories JCI-PSA-2026-07, JCI-PSA-2026-13, and JCI-PSA-2026-16 at the following location: https://www.johnsoncontrols.com/trust-center/cybersecurity/security-advisorieshttps://www.johnsoncontrols.com/trust-center/cybersecurity/security-advisories Relevant CWE: CWE-918 Server-Side Request Forgery (SSRF) Metrics CVSS Version Base Score Base Severity Vector String 3.1 9.6 CRITICAL CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H 4.0 9.4 CRITICAL CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H CVE-2026-34496 Under certain circumstances, successful exploitation of this vulnerability could result in low privilege users accessing unauthorized pages such as Users and Logs. Successful exploitation could allow an attacker to view sensitive system information, user account details, and audit logs beyond their intended access level, potentially enabling further attacks or unauthorized administrative actions. View CVE Details Affected Products Johnson Controls C-CURE 9000 and Victor application server Vendor:Johnson Controls Product Version:Johnson Controls victor Web: <=v7.1 Product Status:known_affected Remediations Vendor fix(CVE-2026-21653, CVE-2026-34496) Update all victor Web installations to version 7.0 or later, which contains the fix for this vulnerability. The fix has been validated through independent retest. MitigationFirewall / access control lists - Implement strict firewall rules to block all unnecessary inbound connections to port 8999 from untrusted network segments. MitigationIntrusion detection / prevention - Deploy IDS/IPS signatures tuned to detect known .NET deserialization exploit payloads (e.g., ysoserial.net patterns) targeting port 8999. MitigationApplication whitelisting - Enforce application whitelisting on application server hosts to prevent unauthorized executables from being launched by the server process. MitigationLeast privilege - Ensure the application server process runs with the minimum privileges necessary, reducing the impact of successful exploitation. MitigationMonitor and audit - Enable detailed logging on application server hosts and monitor for anomalous process creation by SoftwareHouse.CrossFire.Server.exe. MitigationDisable unnecessary services - If the ClientConnectionManager_NF.SynchronousServerNotification callback interface is not required, disable or restrict it to reduce attack surface. MitigationFor more detailed mitigation instructions, please see Johnson Controls Product Securit
Indicators of Compromise
- cve — CVE-2026-21655
- cve — CVE-2026-21653
- cve — CVE-2026-34496