Original Article Summary

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 Mitigation Johnson 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 fix Network 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. Mitigation Firewall / access control lists - Implement strict firewall rules to block all unnecessary inbound connections to port 8999 from untrusted network segments. Mitigation Intrusion detection / prevention - Deploy IDS/IPS signatures tuned to detect known .NET deserialization exploit payloads (e.g., ysoserial.net patterns) targeting port 8999. Mitigation Application whitelisting - Enforce application whitelisting on application server hosts to prevent unauthorized executables from being launched by the server process. Mitigation Least privilege - Ensure the application server process runs with the minimum privileges necessary, reducing the impact of successful exploitation. Mitigation Monitor and audit - Enable detailed logging on application server hosts and monitor for anomalous process creation by SoftwareHouse.CrossFire.Server.exe. Mitigation Disable unnecessary services - If the ClientConnectionManager_NF.SynchronousServerNotification callback interface is not required, disable or restrict it to reduce attack surface. Mitigation For 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-advisories https://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. Mitigation Firewall / access control lists - Implement strict firewall rules to block all unnecessary inbound connections to port 8999 from untrusted network segments. Mitigation Intrusion detection / prevention - Deploy IDS/IPS signatures tuned to detect known .NET deserialization exploit payloads (e.g., ysoserial.net patterns) targeting port 8999. Mitigation Application whitelisting - Enforce application whitelisting on application server hosts to prevent unauthorized executables from being launched by the server process. Mitigation Least privilege - Ensure the application server process runs with the minimum privileges necessary, reducing the impact of successful exploitation. Mitigation Monitor and audit - Enable detailed logging on application server hosts and monitor for anomalous process creation by SoftwareHouse.CrossFire.Server.exe. Mitigation Disable unnecessary services - If the ClientConnectionManager_NF.SynchronousServerNotification callback interface is not required, disable or restrict it to reduce attack surface. Mitigation For 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-advisories https://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. Mitigation Firewall / access control lists - Implement strict firewall rules to block all unnecessary inbound connections to port 8999 from untrusted network segments. Mitigation Intrusion detection / prevention - Deploy IDS/IPS signatures tuned to detect known .NET deserialization exploit payloads (e.g., ysoserial.net patterns) targeting port 8999. Mitigation Application whitelisting - Enforce application whitelisting on application server hosts to prevent unauthorized executables from being launched by the server process. Mitigation Least privilege - Ensure the application server process runs with the minimum privileges necessary, reducing the impact of successful exploitation. Mitigation Monitor and audit - Enable detailed logging on application server hosts and monitor for anomalous process creation by SoftwareHouse.CrossFire.Server.exe. Mitigation Disable unnecessary services - If the ClientConnectionManager_NF.SynchronousServerNotification callback interface is not required, disable or restrict it to reduce attack surface. Mitigation For 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-advisories https://www.johnsoncontrols.com/trust-center/cybersecurity/security-advisories Relevant CWE: CWE-250 Execution with Unnecessary Privileges Metrics CVSS Version Base Score Base Severity Vector String 3.1 8 HIGH CVSS:3.1/AV:A/AC:L/PR:L/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 Acknowledgments Harrison Neal reported these vulnerabilities to CISA Legal Notice and Terms of Use This product is provided subject to this Notification (https://www.cisa.gov/notification) and this Privacy & Use policy (https://www.cisa.gov/privacy-policy). Recommended Practices CISA recommends users take defensive measures to minimize the risk of exploitation of these vulnerabilities. CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures. CISA also provides a section for control systems security recommended practices on the ICS webpage on cisa.gov/ics. Several CISA products detailing cyber defense best practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies. CISA encourages organizations to implement recommended cybersecurity strategies for proactive defense of ICS assets. Additional mitigation guidance and recommended practices are publicly available on the ICS webpage at cisa.gov/ics in the technical information paper, ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation Strategies. Organizations observing suspected malicious activity should follow established internal procedures and report findings to CISA for tracking and correlation against other incidents. CISA also recommends users take the following measures to protect themselves from social engineering attacks: Do not click web links or open attachments in unsolicited email messages. Refer to Recognizing and Avoiding Email Scams for more information on avoiding email scams. Refer to Avoiding Social Engineering and Phishing Attacks for more information on social engineering attacks. No known public exploitation specifically targeting this vulnerability has been reported to CISA at this time. Revision History Initial Release Date: 2026-07-23 Date Revision Summary 2026-07-23 1 Initial Republication of Johnson Controls Product Security Advisories JCI-PSA-2026-07, JCI-PSA-2026-13, and JCI-PSA-2026-16 Legal Notice and Terms of Use