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
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.
Affected Products
Johnson Controls C-CURE 9000 and Victor application server
Johnson Controls
Johnson Controls C-CURE 9000 and victor: <=v2.90_v3.0
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.
Affected Products
Johnson Controls C-CURE 9000 and Victor application server
Johnson Controls
Johnson Controls victor Web: <v7.0
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.
Affected Products
Johnson Controls C-CURE 9000 and Victor application server
Johnson Controls
Johnson Controls victor Web: <=v7.1
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 |
